I decided 13 years ago that I don't want get into React, and continue to have a long and successful career in software development. A couple of times I've had to lean in and do some React work, so I learned the specific bits I needed for those projects, and I was slower and worse than an expert would be but got the job done. Perhaps I'm naive, but it doesn't seem like there was anything in React where I've been left behind and couldn't learn it now if I had a need to.