There are new things in any successful field. Just because there is something new doesn't mean you're obliged to learn it immediately. If you really want to keep up it is enough to read about the what and why of new stuff without going in deeply at the first second. Maybe you will face some problem later, that will be a chance for the new thing to get used on purpose.
For React: I really cannot understand why it is React you draw out here. Its beginning hype phase is over and its in a quite calm state of steady and slow evolution. There are new hype things like Svelte (indeed cool!) and Flutter yes... but... writing about "fatigue" and searching the solution in following the most current hypes? Deems inconsistent ;)