Javascript UI frameworks last longer the Microsoft UI frameworks. It's not like a newer framework is just replacing an old one because of hype. React/Vue are massive improvements over Angular 1.
To be completely fair, changes occur way too often even when the name doesn't change. I tried to find a nice component library for starting out with Vue after not doing any frontend or JavaScript in years (I kind of quit when JSPM, the package manager, was hot).
It took me about an hour to figure out nothing I tried to set up worked because I had installed Vue 3 and mostly everything else was still on Vue 2.
Reminds me of Angular 2 rewriting their router every 6 weeks - to the point that they just moved on to calling it Angular 3 at release to rid themselves of the information on StackOverflow that was in a constant state of deprecation.
It took me about an hour to figure out nothing I tried to set up worked because I had installed Vue 3 and mostly everything else was still on Vue 2.
Reminds me of Angular 2 rewriting their router every 6 weeks - to the point that they just moved on to calling it Angular 3 at release to rid themselves of the information on StackOverflow that was in a constant state of deprecation.