There is reason async/await got so popular after it was adopted by C# based in the early Async work in F# :)

Stackful coroutines have their pros but they are not a better choice. Rust did not and will not adopt them nor any other serious systems programming language will.

You don’t have to follow noisy style you often see - tasks compose nicely and express deferred operations incredibly well in a way that will not blow up on you in a surprising way.

There is an ongoing Async2 project which will massively reduce task state machine overhead further by only ever paying for it in the code that actually suspends rather than the code that just forwards the calls or doesn’t. It will likely land as preview in .NET 10 and as full release in .NET 11.