Am I missing something, or is the content here too minimal?

For this to be genuinely useful, I’d expect at least a few code examples—and ideally a link to a working repo to show it in action.

With Typescript you could(prob still can) specify how JSX tags are translated, so you can get the regular data structure without React dependency.

It's hard to get the idea down from one's head into a document, as this text shows.

I do not follow, can anyone help with more code/config examples of how to leverage this?

This is in essence being used to emulate Bun.js behaviour with node. Have you tried bun?

(ab)?using ?

This is a reinvention of HMR, no?