Sorry, but this is a rewriting of history and the present facts, and I can't let it go unchallenged.
React was first released in 2013, whereas Angular (2) was first released in 2016. React was already a very popular and rapidly growing framework by that point, so the idea that people adopted it simply because of Angular 2 is clearly false.
And while the migration process from Angular 1 to 2 was painful, it's simply untrue to say that nobody bothered, or that every AngularJS developer moved away. If you look at a source like https://hotframeworks.com/, which sources framework popularity data from GitHub and Stack Overflow, you can see that Angular has achieved a significant amount of adoption, and there are plenty of examples of people migrating successfully from 1 to 2+.