Comment by kccqzy

Being mere control flow is a good thing: some async/await implementations are just desugared into a state machine anyways, and it totally works on a single thread. Early async/await in Python was just a small generalization of its existing generator mechanism, and nobody would think generators in Python enables parallelism: it was always a control flow construct. This cleanly demonstrates the separation between the concepts of concurrency versus parallelism.

And of course go routines and channels can also be desugared into mere control flow. That’s how ClojureScript does async.