Angular is indeed quite popular. Same as go is not the most used programming language in the world, angular may not be the most used frontend framework, but it's in the top tier.

> If that were enough Angular would be more popular than it is.

What are you talking about? Angular is already one of the two major frontend frameworks, the other one being Facebook-backed React.

A couple of years ago Angular was the undisputed popularity king, to boot.

Angular is not a language but a framework. A more reasonable comparison would be Dart.

Besides, being backed by a $CORP is necessary condition but not a sufficient condition for a language to become mainstream.