You are right, but it does lead to additional complexity in terms of using available documentation and examples. A big part of the efficiencies we have today is the ability to leverage multiple libraries to get things done.

I wanted to leverage Firebase, but the examples available were for Angular 1 at the time. Angular 2 support was new enough that I was blazing my own trail. RxJS was undergoing major upheaval as well. Using Redux ideas in Angular 2 (NGRX) is/was in a state of flux. Everything is in a state of change; when you find examples of how to integrate things, typically one or more of the libraries you're working with are at a slightly different level than the things you've already integrated into your codebase from the last set of examples and best practices you integrated.

I'm not saying the situation is impossible, just that it introduces additional friction and difficulty compared to working with a more mature less cutting edge toolset.