No need for virtual/generic methods here now.

src/Avalonia.Base/AvaloniaObject.cs

@@ -414,7 +414,7 @@ namespace Avalonia
         /// <param name="property">The property.</param>
         /// <param name="binding">The binding.</param>
         /// <returns>
-        /// A disposable which can be used to terminate the binding.
+        /// The binding expression which represents the binding instance on this object.
         /// </returns>
         public BindingExpressionBase Bind(AvaloniaProperty property, IBinding binding)
         {
@@ -423,7 +423,7 @@ namespace Avalonia
             if (b.Instance(this, property) is not UntypedBindingExpressionBase expression)
                 throw new NotSupportedException("Binding returned unsupported IBindingExpression.");
 
-            return property.RouteBind(this, expression);
+            return GetValueStore().AddBinding(property, expression);
         }
 
         /// <summary>
@@ -628,13 +628,6 @@ namespace Avalonia
         internal ValueStore GetValueStore() => _values;
         internal IReadOnlyList<AvaloniaObject>? GetInheritanceChildren() => _inheritanceChildren;
 
-        internal IDisposable Bind(
-            AvaloniaProperty property,
-            UntypedBindingExpressionBase expression)
-        {
-            return property.RouteBind(this, expression);
-        }
-
         /// <summary>
         /// Called to update the validation state for properties for which data validation is
         /// enabled.

src/Avalonia.Base/AvaloniaProperty.cs

@@ -561,15 +561,6 @@ namespace Avalonia
             IObservable<object?> source,
             BindingPriority priority);
 
-        /// <summary>
-        /// Routes an untyped Bind call to a typed call.
-        /// </summary>
-        /// <param name="o">The object instance.</param>
-        /// <param name="source">The binding source.</param>
-        internal abstract BindingExpressionBase RouteBind(
-            AvaloniaObject o,
-            UntypedBindingExpressionBase source);
-
         /// <summary>
         /// Overrides the metadata for the property on the specified type.
         /// </summary>

src/Avalonia.Base/Data/BindingOperations.cs

@@ -27,7 +27,7 @@ namespace Avalonia.Data
 
             if (binding.Expression is { } expression)
             {
-                return target.Bind(property, expression);
+                return target.GetValueStore().AddBinding(property, expression);
             }
 
             var mode = binding.Mode;

src/Avalonia.Base/DirectPropertyBase.cs

@@ -182,10 +182,5 @@ namespace Avalonia
         {
             return o.Bind(this, source);
         }
-
-        internal override BindingExpressionBase RouteBind(AvaloniaObject o, UntypedBindingExpressionBase source)
-        {
-            return o.GetValueStore().AddBinding(this, source);
-        }
     }
 }

src/Avalonia.Base/PropertyStore/ImmediateValueFrame.cs

@@ -15,7 +15,7 @@ namespace Avalonia.PropertyStore
         {
         }
 
-        public IValueEntry AddBinding<T>(UntypedBindingExpressionBase source)
+        public IValueEntry AddBinding(UntypedBindingExpressionBase source)
         {
             Add(source);
             return source;

src/Avalonia.Base/PropertyStore/ValueStore.cs

@@ -43,32 +43,43 @@ namespace Avalonia.PropertyStore
             ReevaluateEffectiveValues();
         }
 
-        public BindingExpressionBase AddBinding<T>(
-            StyledProperty<T> property,
+        public BindingExpressionBase AddBinding(
+            AvaloniaProperty property,
             UntypedBindingExpressionBase source)
         {
-            var priority = source.Priority;
-
-            if (priority == BindingPriority.LocalValue)
+            if (property.IsDirect)
             {
                 DisposeExistingLocalValueBinding(property);
                 _localValueBindings ??= new();
                 _localValueBindings[property.Id] = source;
-                source.AttachAndStart(this, Owner, property, priority);
+                source.AttachAndStart(this, Owner, property, BindingPriority.LocalValue);
                 return source;
             }
             else
             {
-                var effective = GetEffectiveValue(property);
-                var frame = GetOrCreateImmediateValueFrame(property, priority, out _);
+                var priority = source.Priority;
+
+                if (priority == BindingPriority.LocalValue)
+                {
+                    DisposeExistingLocalValueBinding(property);
+                    _localValueBindings ??= new();
+                    _localValueBindings[property.Id] = source;
+                    source.AttachAndStart(this, Owner, property, priority);
+                    return source;
+                }
+                else
+                {
+                    var effective = GetEffectiveValue(property);
+                    var frame = GetOrCreateImmediateValueFrame(property, priority, out _);
 
-                source.Attach(this, Owner, property, priority);
-                frame.AddBinding<T>(source);
+                    source.Attach(this, Owner, property, priority);
+                    frame.AddBinding(source);
 
-                if (effective is null || priority <= effective.Priority)
-                    source.Start();
+                    if (effective is null || priority <= effective.Priority)
+                        source.Start();
 
-                return source;
+                    return source;
+                }
             }
         }
 
@@ -156,15 +167,6 @@ namespace Avalonia.PropertyStore
             }
         }
 
-        public BindingExpressionBase AddBinding<T>(DirectPropertyBase<T> property, UntypedBindingExpressionBase source)
-        {
-            DisposeExistingLocalValueBinding(property);
-            _localValueBindings ??= new();
-            _localValueBindings[property.Id] = source;
-            source.AttachAndStart(this, Owner, property, BindingPriority.LocalValue);
-            return source;
-        }
-
         public IDisposable AddBinding<T>(DirectPropertyBase<T> property, IObservable<BindingValue<T>> source)
         {
             var observer = new DirectBindingObserver<T>(this, property);

src/Avalonia.Base/StyledProperty.cs

@@ -228,11 +228,6 @@ namespace Avalonia
             return target.Bind<TValue>(this, source, priority);
         }
 
-        internal override BindingExpressionBase RouteBind(AvaloniaObject o, UntypedBindingExpressionBase source)
-        {
-            return o.GetValueStore().AddBinding(this, source);
-        }
-
         [UnconditionalSuppressMessage("Trimming", "IL2026", Justification = TrimmingMessages.ImplicitTypeConversionSupressWarningMessage)]
         private bool ShouldSetValue(AvaloniaObject target, object? value, [NotNullWhen(true)] out TValue? converted)
         {

tests/Avalonia.Base.UnitTests/AvaloniaPropertyTests.cs

@@ -175,11 +175,6 @@ namespace Avalonia.Base.UnitTests
                 throw new NotImplementedException();
             }
 
-            internal override BindingExpressionBase RouteBind(AvaloniaObject o, UntypedBindingExpressionBase source)
-            {
-                throw new NotImplementedException();
-            }
-
             internal override void RouteClearValue(AvaloniaObject o)
             {
                 throw new NotImplementedException();