Our company saw the writing on the wall several years ago and completely ditched AngularJs and moved to React. It was wildly successful - after the whole project was rewritten there was dramatically less code, even though we added tests and new features along the way.
https://www.singlewire.com/blog/development/react-migration
Just doing it piece-by-piece was a really good strategy, instead of a stop-the-world rewrite.