I don't understand your problem TBH.

You don't like React - surely you know that there are other options out there? Like Angular for example, Vue, and somewhere I hear they use Ember. There is even a new version of Dojo. I really don't get why it is so hard to pick another stack. Angular for example seems fairly used, and you can even use Dart if you want to move away from JS.

If it's the pace of change you are not happy about then you are probably burned out and I suggest you move to the backend where things are slower (although with kubernetes and AWS and Kafka and all that jazz things are getting pretty wild there too). Java, PHP for example. Python if you want to dabble in data science. There are plenty others, Rust or Golang to name a couple.

Swift suffers from the same problem as React, and most of your existing knowledge will be useless.