I do this with TypeScript on my current contract, I limit its use to almost "JavaScript with Types", only using features (other than types) that have made it into core JS.
I understand the anxiety over the ever increasing pressure to have knowledge of all these APIs and features, but you don't need to. Being a good developer is having a wide but shallow (even only knowing the existence of something) understanding of the platforms. Enough to start. No "real" developers code without constantly referring to docs, or Googling (or using chatGPT) to help.
Personally there are a few new things coming I am super excited about. To call out one, the new "popup" element will apparently have its own stacking context, elevated to the top compositing layer, no mater how nested within other stacking contexts the node is. That's going to be the best things since sliced bread, lots of code I can simplify, bugs that will be easier to close. Other people won't have a need, and so don't need to even touch it.