[coxmichael]

Out of interest, what language features do you see JavaScript needing to support these kinds of fine-grained reactive updates, and to allow destructuring?

I'd assume something like es6 proxies for primitive values would be needed, but that, nor built-in reactive primitives, are being discussed currently as far as I know.

Personally, I'd love to see reactive `[].map` equivalents (no need to use <For> components), but that's possible today with a reactive wrapper or (god forbid) patching the prototype.