While this is true in some sense, there's also a difference between the language changing to support a use-case, and the library ecosystem. The language doesn't _need_ to change for the async io stuff, though there is one feature that will be extremely helpful, "impl Trait". That feature is also needed for other reasons too, so it's not solely motivated by the async io stuff.

It is totally true that there are many areas that can be improved, and it's gonna take time and effort to knock them out. It's tough! My personal pet area is OS dev...