Everyone giving this example keeps missing the part of Google politics, where the team lost the support from Chrome team, the language development was rescued by AdWords team that had just migrated from GWT into AngularDart before this occurred, key language designers like Gilad Bracha and Kasper Lund left Google, Angular migration to Typescript, leaving Dart only existence reason being powering AdWords until Flutter came to be.

Nowadays I would bet there are more people using Flutter/Dart than either Xamarin, Cordova or React Native on mobile apps.

Also anyone using JavaScript libraries like scss, is dependent on Dart, at least until they remember to rewrite it in Rust, as is now fashionable on JavaScript tooling ecosystem.