Is Explicit Concurrency in Rust worth it?

[gortiz]

There is thread in this forum where some people, including @njs, talk about the rust approach to concurrency.
I think it really worth to take a look:

Structured concurrency in Rust

Ah, but this is a radically different proposal than the one I wrote :-). In my proposal, remember, async is just a marker for the compiler that you want to opt-in to a coroutine / green-threads-like system – there’s no built-in connection to the Future machinery. In this approach, the only distinction between a sync function call vs. an async function call is that during an async call, the coroutine runner has the option of temporarily preempting this green-thread and letting some other green-…