Why is that?
React itself became quite a mess as well nowadays, it's becoming bigger and more bloated with each release. You can now very easily re-create the AngularJS hell in React.
JavaScript doesn't scale in productivity and in terms of performance, TypeScript solves the productivity problem, but you still suffer a lot due to JavaScript's poor runtime performance characteristics.
If you only need native platforms and/or just want to use the web target as an app demo, it's a good option, it feels very solid and productive
And it begat JSON, which is nice.