Go handles it quite nicely. It's not perfect, but it is nice. Every function is a coroutine. There is no such thing as a non-async fn in Go. But if you want explicit await-like concurrency, then you can explicitly wait on a message from a channel.

Every time I bring this up there are people who jump in with excuses for why Rust can't do something similar. But these are either (1) historical accidents in the sense of implementing goroutines would've broken existing code [fair], or (2) excuses. Go's approach is much harder to get right, and much more pervasive in the impact on the language. But when it's done well, it's really smooth to use.

I use Rust as my daily driver because I want the safety guarantees that Rust gives, and cargo is pretty nice. But every time I need to do something highly concurrent, I wish I was working in Go...