diff --git a/Libraries/Lists/FlatList.js b/Libraries/Lists/FlatList.js
index 9719aff75f010c..eace682747649c 100644
--- a/Libraries/Lists/FlatList.js
+++ b/Libraries/Lists/FlatList.js
@@ -190,7 +190,10 @@ type OptionalProps<ItemT> = {
    * @platform android
    */
   progressViewOffset?: number,
-  legacyImplementation?: ?boolean,
+  /**
+   * The legacy implementation is no longer supported.
+   */
+  legacyImplementation?: empty,
   /**
    * Set this true while waiting for new data from a refresh.
    */
diff --git a/Libraries/Lists/SectionList.js b/Libraries/Lists/SectionList.js
index 396344a05c1b3e..10c26fd1437537 100644
--- a/Libraries/Lists/SectionList.js
+++ b/Libraries/Lists/SectionList.js
@@ -181,7 +181,10 @@ type OptionalProps<SectionT: SectionBase<any>> = {
    */
   stickySectionHeadersEnabled?: boolean,
 
-  legacyImplementation?: ?boolean,
+  /**
+   * The legacy implementation is no longer supported.
+   */
+  legacyImplementation?: empty,
 };
 
 export type Props<SectionT> = RequiredProps<SectionT> &
@@ -323,9 +326,7 @@ class SectionList<SectionT: SectionBase<any>> extends React.PureComponent<
   }
 
   render() {
-    const List = this.props.legacyImplementation
-      ? MetroListView
-      : VirtualizedSectionList;
+    const List = VirtualizedSectionList;
     /* $FlowFixMe(>=0.66.0 site=react_native_fb) This comment suppresses an
      * error found when Flow v0.66 was deployed. To see the error delete this
      * comment and run Flow. */
diff --git a/RNTester/js/FlatListExample.js b/RNTester/js/FlatListExample.js
index 2f27f32241afa6..d8eeb4626cf7ba 100644
--- a/RNTester/js/FlatListExample.js
+++ b/RNTester/js/FlatListExample.js
@@ -131,7 +131,6 @@ class FlatListExample extends React.PureComponent<{}, $FlowFixMeState> {
             }
             keyboardShouldPersistTaps="always"
             keyboardDismissMode="on-drag"
-            legacyImplementation={false}
             numColumns={1}
             onEndReached={this._onEndReached}
             onRefresh={this._onRefresh}
diff --git a/RNTester/js/MultiColumnExample.js b/RNTester/js/MultiColumnExample.js
index d943c4d323837e..1266cf1b6f771e 100644
--- a/RNTester/js/MultiColumnExample.js
+++ b/RNTester/js/MultiColumnExample.js
@@ -96,7 +96,6 @@ class MultiColumnExample extends React.PureComponent<
           renderItem={this._renderItemComponent}
           disableVirtualization={!this.state.virtualized}
           onViewableItemsChanged={this._onViewableItemsChanged}
-          legacyImplementation={false}
         />
       </RNTesterPage>
     );
diff --git a/RNTester/js/RNTesterExampleList.js b/RNTester/js/RNTesterExampleList.js
index 28541443bd50de..c99b1b222e6fb9 100644
--- a/RNTester/js/RNTesterExampleList.js
+++ b/RNTester/js/RNTesterExampleList.js
@@ -111,7 +111,6 @@ class RNTesterExampleList extends React.Component<Props, $FlowFixMeState> {
           keyboardShouldPersistTaps="handled"
           automaticallyAdjustContentInsets={false}
           keyboardDismissMode="on-drag"
-          legacyImplementation={false}
           renderSectionHeader={renderSectionHeader}
         />
       </View>