[watwut]

You are not starting over every 2-4 years. A lot of what you learned is reusable, those frameworks resemble each other great deal. Even with changing languages, it is hard only when you are changing paradigm (procedural to object to functional). Things like syntax take less effort to pick up and re-learn. Algorithms, debugging and structuring of code and similar meta skills remain. Moreover, you dont have to chase every fad. They come and go and it is perfectly ok to skip some of them. Focus on things that you need or that promise longevity. Nobody cares now that I skipped COM+ years ago, nobody cares that I skipped browser differences or ruby just a few years ago and nobody will care that I am ignoring angular and python now.

I did jumped into established projects using libraries/frameworks I was not at all familiar with and liked it. Thankfully companies here are willing to hire like that. It is period when they literally pay you for learning on the job. That is awesome, it is hard to ask for more.