What's the point of computed when you have selectors?

[RIP21]

Hey, thanks for the lib, but I'm confused a lot, since I started using your lib for a bit more complicated cases, so here is the question.

I don't get it :)
Selectors in hooks allow for computed values already.
E.g. const useSomeThing = () => store.use(state => {...}) where {...} is a calculation of the computed value.

Maybe it makes sense for the usage outside of React, but other than that. Are there any benefits? Or is it just selectors under the hood?
And it's also unclear, should you use store.value.use() there or store.value.get() inside these computed callbacks and how come you can use use() when it's not in React runtime context (that's how it's shown in the docs)
Maybe computed somehow allows for equality functions or something like that, so it won't recompute when the equality function returns true not to rerun expensive calculation?

So many unknowns :) A better Kitchen Sink kind of example that uses all the stuff in an idiomatic way would be great if docs aren't covering it call.