[valand]

On React, people talk about it especially for it being a UI tool.

But the most significant feat React achieved IMO is how easy to write asynchronous hiearchical actors (from actor model) with it (kind of like erlang vm).

Context enables dependency injection and ownership management. Effect and state enables object ownership and lifetime management. Js timers, (i.e. setTimeout, setInterval, queueMicrotask, promise/async), help making an object living asynchronously as if it has its own private thread.

Yes, those are similar concept of lifetime and ownership Rust have, but instead of functions/blocks the object (value in memory) is owned by/shared with components. And of course these are not enforceable by compilers/transpilers/linters due to them not being a javascript-primitive, but at least React helps organizing those things in a lot more explicit and clear manner.