diff --git a/third_party/blink/renderer/core/animation/css/css_animations.cc b/third_party/blink/renderer/core/animation/css/css_animations.cc
index d305df81b8715f..39e2a0e5c5ed39 100644
--- a/third_party/blink/renderer/core/animation/css/css_animations.cc
+++ b/third_party/blink/renderer/core/animation/css/css_animations.cc
@@ -1632,8 +1632,7 @@ void CSSAnimations::CalculateAnimationUpdate(
 
   if (animation_data &&
       (style_builder.Display() != EDisplay::kNone ||
-       (RuntimeEnabledFeatures::CSSDisplayAnimationEnabled() && old_style &&
-        old_style->Display() != EDisplay::kNone))) {
+       (old_style && old_style->Display() != EDisplay::kNone))) {
     const Vector<AtomicString>& name_list = animation_data->NameList();
     for (wtf_size_t i = 0; i < name_list.size(); ++i) {
       AtomicString name = name_list[i];
@@ -2366,7 +2365,6 @@ void CSSAnimations::CalculateTransitionUpdateForPropertyHandle(
   }
 
   if (!start || !end) {
-    DCHECK(RuntimeEnabledFeatures::CSSTransitionDiscreteEnabled());
     const Document& document = state.animating_element.GetDocument();
     const CSSValue* start_css_value =
         AnimationUtils::KeyframeValueFromComputedStyle(
@@ -2540,11 +2538,6 @@ void CSSAnimations::CalculateTransitionUpdateForStandardProperty(
                                            writing_direction.GetWritingMode());
     PropertyHandle property_handle = PropertyHandle(property);
 
-    if (!RuntimeEnabledFeatures::CSSTransitionDiscreteEnabled() &&
-        !animate_all && !property.IsInterpolable()) {
-      continue;
-    }
-
     CalculateTransitionUpdateForPropertyHandle(
         state, transition_property.property_type, property_handle,
         transition_index, animate_all);
@@ -3165,9 +3158,6 @@ bool CSSAnimations::IsAnimationAffectingProperty(const CSSProperty& property) {
     case CSSPropertyID::kWillChange:
     case CSSPropertyID::kWritingMode:
       return true;
-    case CSSPropertyID::kDisplay:
-    case CSSPropertyID::kContentVisibility:
-      return !RuntimeEnabledFeatures::CSSDisplayAnimationEnabled();
     default:
       return false;
   }
diff --git a/third_party/blink/renderer/core/animation/css_interpolation_types_map.cc b/third_party/blink/renderer/core/animation/css_interpolation_types_map.cc
index 4d42327d540172..8147450e8b061a 100644
--- a/third_party/blink/renderer/core/animation/css_interpolation_types_map.cc
+++ b/third_party/blink/renderer/core/animation/css_interpolation_types_map.cc
@@ -435,12 +435,10 @@ const InterpolationTypes& CSSInterpolationTypesMap::Get(
             std::make_unique<CSSBasicShapeInterpolationType>(used_property));
         break;
       case CSSPropertyID::kDisplay:
-        DCHECK(RuntimeEnabledFeatures::CSSDisplayAnimationEnabled());
         applicable_types->push_back(
             std::make_unique<CSSDisplayInterpolationType>(used_property));
         break;
       case CSSPropertyID::kContentVisibility:
-        DCHECK(RuntimeEnabledFeatures::CSSDisplayAnimationEnabled());
         applicable_types->push_back(
             std::make_unique<CSSContentVisibilityInterpolationType>(
                 used_property));
diff --git a/third_party/blink/renderer/core/css/css_properties.json5 b/third_party/blink/renderer/core/css/css_properties.json5
index 85d919e24475c3..67bbe3ce6edd12 100644
--- a/third_party/blink/renderer/core/css/css_properties.json5
+++ b/third_party/blink/renderer/core/css/css_properties.json5
@@ -1047,7 +1047,6 @@
       is_animation_property: true,
       // Animation properites are never incremental.
       supports_incremental_style: false,
-      runtime_flag: "CSSTransitionDiscrete",
     },
     {
       name: "transition-timing-function",
diff --git a/third_party/blink/renderer/core/css/style_property_shorthand_custom.cc b/third_party/blink/renderer/core/css/style_property_shorthand_custom.cc
index c2e26de82feb02..5fff2169089556 100644
--- a/third_party/blink/renderer/core/css/style_property_shorthand_custom.cc
+++ b/third_party/blink/renderer/core/css/style_property_shorthand_custom.cc
@@ -29,14 +29,6 @@ namespace blink {
 // change the spec to use this order, see:
 // https://github.com/w3c/csswg-drafts/issues/4223
 const StylePropertyShorthand& transitionShorthandForParsing() {
-  static const CSSProperty* kTransitionProperties[] = {
-      &GetCSSPropertyTransitionDuration(),
-      &GetCSSPropertyTransitionTimingFunction(),
-      &GetCSSPropertyTransitionDelay(), &GetCSSPropertyTransitionProperty()};
-  static StylePropertyShorthand transition_longhands(
-      CSSPropertyID::kTransition, kTransitionProperties,
-      std::size(kTransitionProperties));
-
   static const CSSProperty* kTransitionPropertiesWithAnimationType[] = {
       &GetCSSPropertyTransitionBehavior(), &GetCSSPropertyTransitionDuration(),
       &GetCSSPropertyTransitionTimingFunction(),
@@ -45,9 +37,7 @@ const StylePropertyShorthand& transitionShorthandForParsing() {
       CSSPropertyID::kTransition, kTransitionPropertiesWithAnimationType,
       std::size(kTransitionPropertiesWithAnimationType));
 
-  return RuntimeEnabledFeatures::CSSTransitionDiscreteEnabled()
-             ? transition_longhands_with_animation_type
-             : transition_longhands;
+  return transition_longhands_with_animation_type;
 }
 
 unsigned indexOfShorthandForLonghand(
diff --git a/third_party/blink/renderer/core/dom/element.cc b/third_party/blink/renderer/core/dom/element.cc
index 12c7140be9fff4..d1805fd8bdf891 100644
--- a/third_party/blink/renderer/core/dom/element.cc
+++ b/third_party/blink/renderer/core/dom/element.cc
@@ -3955,8 +3955,7 @@ StyleRecalcChange Element::RecalcOwnStyle(
         // display:none. If new_style is otherwise set to display:none, then it
         // means an animation set display:none, and an animation shouldn't
         // cancel itself in this case.
-        if (base_is_display_none ||
-            !RuntimeEnabledFeatures::CSSDisplayAnimationEnabled()) {
+        if (base_is_display_none) {
           element_animations->CssAnimations().Cancel();
         }
       }
diff --git a/third_party/blink/renderer/platform/runtime_enabled_features.json5 b/third_party/blink/renderer/platform/runtime_enabled_features.json5
index bc4e41c89e19a6..29944122050f60 100644
--- a/third_party/blink/renderer/platform/runtime_enabled_features.json5
+++ b/third_party/blink/renderer/platform/runtime_enabled_features.json5
@@ -801,10 +801,6 @@
       name: "CSSCustomStateNewSyntax",
       status: "stable",
     },
-    {
-      name: "CSSDisplayAnimation",
-      status: "stable",
-    },
     {
       name: "CSSDisplayModePictureInPicture",
       status: "stable",
@@ -1047,10 +1043,6 @@
       name: "CSSTextSpacingTrim",
       status: "stable",
     },
-    {
-      name: "CSSTransitionDiscrete",
-      status: "stable",
-    },
     {
       // Support for tree-scoped [1] timeline names (e.g. produced by
       // scroll-timeline).