> [Async/await] feels so complicated and hacky, a mediocre very high level concept that someone managed to implement as a zero-cost abstraction. I feel like I

> [Async/await] feels so complicated and hacky, a mediocre very high level concept that someone managed to implement as a zero-cost abstraction. I feel like I need to point out that Donald “Structured programming with GO TO statements” Knuth included an example of coroutines in the first volume of The art of computer programming, the first edition, dated 1968. In assembly language for an accumulator machine. With a box of scraps!^W^W^W^W^WThat is to say, that C and most other languages have made coroutines awkward and thus virtually unused in the past three decades or so does not mean they are particularly novel or high-level. Granted, Knuth used coroutines in a simulation and not for I/O, so he did not need that much of a scheduler, but still.