A fair point, and I haven't dove into react's inner workings to see how the sausage (I was more discussing the compiled code of the app), but one can reason "how" hooks work after observing them.
- They're tied to the lifecycle of the component, so they must reach "up" into whatever just called our component function.
- They do not like being moved about/conditionally executed, so hook's likely use an array for metadata storage and position rather than needing explicit "hook keys".
I've no clue what svelte does behind the scenes, much the same way as I can't reckon what WASM or assembly do. So I guess I just have to blindly trust the compiler?