diff --git a/solara/components/__init__.py b/solara/components/__init__.py
index 086006059..59bf208e4 100644
--- a/solara/components/__init__.py
+++ b/solara/components/__init__.py
@@ -73,5 +73,4 @@
     logger = logging.getLogger("solara.components")
     logger.warning(f"Default container {main.default_container} not found in solara.components. Defaulting to Column.")
 
-# TODO: When Solara 2.0 releases Column should be replaced with Fragment
-reacton.core._default_container = _container or Column  # noqa: F405
+reacton.core._default_container = _container or Fragment  # noqa: F405
diff --git a/solara/components/head_tag.vue b/solara/components/head_tag.vue
index 4dc6892a0..99d12d6c0 100644
--- a/solara/components/head_tag.vue
+++ b/solara/components/head_tag.vue
@@ -1,4 +1,5 @@
-<template><span></span></template>
+<template>
+</template>
 
 <script>
 module.exports = {
diff --git a/solara/hooks/use_reactive.py b/solara/hooks/use_reactive.py
index 536ca7946..a03afb6d5 100644
--- a/solara/hooks/use_reactive.py
+++ b/solara/hooks/use_reactive.py
@@ -10,6 +10,7 @@ def use_reactive(
     value: Union[T, solara.Reactive[T]],
     on_change: Optional[Callable[[T], None]] = None,
     equals: Callable[[Any, Any], bool] = solara.util.equals_extra,
+    disable_mutation_detection: bool = False,
 ) -> solara.Reactive[T]:
     """Creates a reactive variable with the a local component scope.
 
@@ -111,7 +112,7 @@ def create():
 
             store: ValueBase[T]
 
-            if solara.settings.storage.mutation_detection is True:
+            if not disable_mutation_detection and solara.settings.storage.mutation_detection is True:
                 shared_store = SharedStore[StoreValue[T]](
                     StoreValue[T](private=value, public=_PublicValueNotSet(), get_traceback=None, set_value=_SetValueNotSet(), set_traceback=None),
                     unwrap=lambda x: x.private,
diff --git a/solara/reactive.py b/solara/reactive.py
index a5ad52497..2698bb2e4 100644
--- a/solara/reactive.py
+++ b/solara/reactive.py
@@ -8,7 +8,7 @@
 T = TypeVar("T")
 
 
-def reactive(value: T, equals: Callable[[Any, Any], bool] = solara.util.equals_extra) -> Reactive[T]:
+def reactive(value: T, equals: Callable[[Any, Any], bool] = solara.util.equals_extra, disable_mutation_detection=False) -> Reactive[T]:
     """Creates a new Reactive object with the given initial value.
 
     Reactive objects are mostly used to manage global or application-wide state in
@@ -96,4 +96,4 @@ def Page():
     Whenever the counter value changes, `CounterDisplay` automatically updates to display the new value.
 
     """
-    return Reactive(value, equals=equals)
+    return Reactive(value, equals=equals, disable_mutation_detection=disable_mutation_detection)
diff --git a/solara/settings.py b/solara/settings.py
index 674fd752b..a2d8be495 100644
--- a/solara/settings.py
+++ b/solara/settings.py
@@ -54,9 +54,8 @@ class Config:
 
 class MainSettings(BaseSettings):
     check_hooks: str = "warn"
-    allow_reactive_boolean: bool = True
-    # TODO: also change default_container in solara/components/__init__.py
-    default_container: Optional[str] = "Column"
+    allow_reactive_boolean: bool = False
+    default_container: Optional[str] = "Fragment"
 
     class Config:
         env_prefix = "solara_"
diff --git a/solara/toestand.py b/solara/toestand.py
index ac285d56c..d7ae4838d 100644
--- a/solara/toestand.py
+++ b/solara/toestand.py
@@ -31,6 +31,7 @@
 
 import solara
 import solara.settings
+import solara.server.settings
 from solara import _using_solara_server
 from solara.util import nullcontext
 
@@ -372,7 +373,9 @@ def __init__(self, default_value: S, key=None, equals: Callable[[Any, Any], bool
         self.default_value = default_value
         self._unwrap = unwrap
         self.equals = equals
-        self._mutation_detection = solara.settings.storage.mutation_detection
+        self._mutation_detection = solara.settings.storage.mutation_detection is True or (
+            solara.settings.storage.mutation_detection is None and not solara.server.settings.main.mode == "production"
+        )
         if self._mutation_detection:
             frame = _find_outside_solara_frame()
             if frame is not None:
@@ -468,27 +471,36 @@ def mutation_detection_storage(default_value: S, key=None, equals=None) -> Value
     return MutateDetectorStore[S](kernel_store, equals=equals or default_equals)
 
 
-def default_storage(default_value: S, key=None, equals=None) -> ValueBase[S]:
-    # in solara v2 we will also do this when mutation_detection is None
-    # and we do not run on production mode
-    if solara.settings.storage.mutation_detection is True:
+def default_storage(default_value: S, key=None, equals=None, disable_mutation_detection=False) -> ValueBase[S]:
+    # We use mutation detection if it is explicitly enabled, or if it is not explicitly disabled and
+    # We aren't running in production mode
+    if not disable_mutation_detection and (
+        solara.settings.storage.mutation_detection is True
+        or (solara.settings.storage.mutation_detection is None and not solara.server.settings.main.mode == "production")
+    ):
         return mutation_detection_storage(default_value, key=key, equals=equals)
     else:
         return KernelStoreValue[S](default_value, key=key, equals=equals or equals_extra)
 
 
-def _call_storage_factory(default_value: S, key=None, equals=None) -> ValueBase[S]:
+def _call_storage_factory(default_value: S, key=None, equals=None, disable_mutation_detection=False) -> ValueBase[S]:
     factory = solara.settings.storage.get_factory()
-    return factory(default_value, key=key, equals=equals)
+    try:
+        return factory(default_value, key=key, equals=equals, disable_mutation_detection=disable_mutation_detection)
+    except TypeError as e:
+        if "unexpected keyword argument 'disable_mutation_detection'" in str(e):
+            logger.warning("The custom storage factory %s does not support disable_mutation_detection", factory.__name__)
+            return factory(default_value, key=key, equals=equals)
+        raise TypeError from e
 
 
 class Reactive(ValueBase[S]):
     _storage: ValueBase[S]
 
-    def __init__(self, default_value: Union[S, ValueBase[S]], key=None, equals=None):
+    def __init__(self, default_value: Union[S, ValueBase[S]], key=None, equals=None, disable_mutation_detection=False):
         super().__init__()
         if not isinstance(default_value, ValueBase):
-            self._storage = _call_storage_factory(default_value, key=key, equals=equals)
+            self._storage = _call_storage_factory(default_value, key=key, equals=equals, disable_mutation_detection=disable_mutation_detection)
         else:
             self._storage = default_value
         self.__post__init__()
diff --git a/solara/website/pages/documentation/getting_started/content/04-tutorials/60-jupyter-dashboard-part1.py b/solara/website/pages/documentation/getting_started/content/04-tutorials/60-jupyter-dashboard-part1.py
index 2154b7cf2..0ca4ca6a5 100644
--- a/solara/website/pages/documentation/getting_started/content/04-tutorials/60-jupyter-dashboard-part1.py
+++ b/solara/website/pages/documentation/getting_started/content/04-tutorials/60-jupyter-dashboard-part1.py
@@ -10,56 +10,54 @@
 
 @solara.component
 def Page():
-    with solara.Column(gap=0):
-        title = "Build your Jupyter dashboard using Solara"
-        solara.Meta(property="og:title", content=title)
-        solara.Meta(name="twitter:title", content=title)
-        solara.Title(title)
+    title = "Build your Jupyter dashboard using Solara"
+    solara.Meta(property="og:title", content=title)
+    solara.Meta(name="twitter:title", content=title)
+    solara.Title(title)
 
-        img = "https://dxhl76zpt6fap.cloudfront.net/public/docs/tutorial/jupyter-dashboard1.webp"
-        solara.Meta(name="twitter:image", content=img)
-        solara.Meta(property="og:image", content=img)
+    img = "https://dxhl76zpt6fap.cloudfront.net/public/docs/tutorial/jupyter-dashboard1.webp"
+    solara.Meta(name="twitter:image", content=img)
+    solara.Meta(property="og:image", content=img)
 
-        description = "Learn how to build a Jupyter dashboard and deploy it as a web app using Solara."
-        solara.Meta(name="description", property="og:description", content=description)
-        solara.Meta(name="twitter:description", content=description)
-        tags = [
-            "jupyter",
-            "jupyter dashboard",
-            "dashboard",
-            "web app",
-            "deploy",
-            "solara",
-        ]
-        solara.Meta(name="keywords", content=", ".join(tags))
-        with solara.Column():
-            Notebook(
-                Path(HERE / "_jupyter_dashboard_1.ipynb"),
-                show_last_expressions=True,
-                execute=False,
-                outputs={
-                    "a7d17a84": None,  # empty output (7)
-                    # original: https://github.com/widgetti/solara/assets/1765949/e844acdb-c77d-4df4-ba4c-a629f92f18a3
-                    "82f1d2f7": solara.Image("https://dxhl76zpt6fap.cloudfront.net/pages/docs/content/60-jupyter-dashboard-part1/map.webp"),  # map (11)
-                    "3e7ea361": None,  # (13)
-                    # original: https://github.com/widgetti/solara/assets/1765949/daaa3a46-61f5-431f-8003-b42b5915da4b
-                    "56055643": solara.Image("https://dxhl76zpt6fap.cloudfront.net/pages/docs/content/60-jupyter-dashboard-part1/view.webp"),  # View (15)
-                    # original: https://github.com/widgetti/solara/assets/1765949/2f4daf0f-b7d8-4f70-b04a-c27542cffdb0
-                    "c78010ec": solara.Image("https://dxhl76zpt6fap.cloudfront.net/pages/docs/content/60-jupyter-dashboard-part1/page.webp"),  # Page (20)
-                    # original: https://github.com/widgetti/solara/assets/1765949/a691d9f1-f07b-4e06-b21b-20980476ad64
-                    "18290364": solara.Image("https://dxhl76zpt6fap.cloudfront.net/pages/docs/content/60-jupyter-dashboard-part1/controls.webp"),  # Controls
-                    "0ca68fe8": None,
-                    "fef5d187": None,
-                    # original: https://github.com/widgetti/solara/assets/1765949/f0075ad1-808d-458c-8797-e460ce4dc06d
-                    "af686391": solara.Image("https://dxhl76zpt6fap.cloudfront.net/pages/docs/content/60-jupyter-dashboard-part1/full-app.webp"),  # Full app
-                },
-            )
-            solara.Markdown(
-                """
-                Explore this app live at [solara.dev](/apps/jupyter-dashboard-1).
+    description = "Learn how to build a Jupyter dashboard and deploy it as a web app using Solara."
+    solara.Meta(name="description", property="og:description", content=description)
+    solara.Meta(name="twitter:description", content=description)
+    tags = [
+        "jupyter",
+        "jupyter dashboard",
+        "dashboard",
+        "web app",
+        "deploy",
+        "solara",
+    ]
+    solara.Meta(name="keywords", content=", ".join(tags))
+    Notebook(
+        Path(HERE / "_jupyter_dashboard_1.ipynb"),
+        show_last_expressions=True,
+        execute=False,
+        outputs={
+            "a7d17a84": None,  # empty output (7)
+            # original: https://github.com/widgetti/solara/assets/1765949/e844acdb-c77d-4df4-ba4c-a629f92f18a3
+            "82f1d2f7": solara.Image("https://dxhl76zpt6fap.cloudfront.net/pages/docs/content/60-jupyter-dashboard-part1/map.webp"),  # map (11)
+            "3e7ea361": None,  # (13)
+            # original: https://github.com/widgetti/solara/assets/1765949/daaa3a46-61f5-431f-8003-b42b5915da4b
+            "56055643": solara.Image("https://dxhl76zpt6fap.cloudfront.net/pages/docs/content/60-jupyter-dashboard-part1/view.webp"),  # View (15)
+            # original: https://github.com/widgetti/solara/assets/1765949/2f4daf0f-b7d8-4f70-b04a-c27542cffdb0
+            "c78010ec": solara.Image("https://dxhl76zpt6fap.cloudfront.net/pages/docs/content/60-jupyter-dashboard-part1/page.webp"),  # Page (20)
+            # original: https://github.com/widgetti/solara/assets/1765949/a691d9f1-f07b-4e06-b21b-20980476ad64
+            "18290364": solara.Image("https://dxhl76zpt6fap.cloudfront.net/pages/docs/content/60-jupyter-dashboard-part1/controls.webp"),  # Controls
+            "0ca68fe8": None,
+            "fef5d187": None,
+            # original: https://github.com/widgetti/solara/assets/1765949/f0075ad1-808d-458c-8797-e460ce4dc06d
+            "af686391": solara.Image("https://dxhl76zpt6fap.cloudfront.net/pages/docs/content/60-jupyter-dashboard-part1/full-app.webp"),  # Full app
+        },
+    )
+    solara.Markdown(
+        """
+        Explore this app live at [solara.dev](/apps/jupyter-dashboard-1).
 
-                Don’t miss the next tutorial and stay updated with the latest techniques and insights by subscribing to our newsletter.
-            """
-            )
-            location = solara.use_router().path
-            MailChimp(location=location)
+        Don’t miss the next tutorial and stay updated with the latest techniques and insights by subscribing to our newsletter.
+    """
+    )
+    location = solara.use_router().path
+    MailChimp(location=location)
diff --git a/solara/widgets/vue/navigator.vue b/solara/widgets/vue/navigator.vue
index 95f8d05c0..fee24f0bb 100644
--- a/solara/widgets/vue/navigator.vue
+++ b/solara/widgets/vue/navigator.vue
@@ -1,5 +1,4 @@
 <template>
-  <span></span>
 </template>
 ​
 <script>
diff --git a/tests/unit/toestand_test.py b/tests/unit/toestand_test.py
index 37c713ca1..f2349a356 100644
--- a/tests/unit/toestand_test.py
+++ b/tests/unit/toestand_test.py
@@ -852,13 +852,13 @@ def Test():
 
     box, rc = solara.render(Test(), handle_error=False)
 
-    if solara.settings.storage.mutation_detection:
+    if solara.settings.storage.mutation_detection is not False:
         # a copy is made, so get a reference to the actual used object
         df = get_storage(store).value.public
     assert rc.find(v.Alert).widget.children[0] == repr(id(df))
     df2 = df2.copy()
     store.set(df2)
-    if solara.settings.storage.mutation_detection:
+    if solara.settings.storage.mutation_detection is not False:
         df2 = get_storage(store).value.public
     assert rc.find(v.Alert).widget.children[0] == repr(id(df2))