Ah I see, you perhaps mean a slightly more general concept of coroutines than I was thinking about? Closer to something that fits a thread-like interface on top

Ah I see, you perhaps mean a slightly more general concept of coroutines than I was thinking about? Closer to something that fits a thread-like interface on top of actual threads regardless of whether it's being done through direct yields or intermediated by some sort of scheduler? Basically the crucial point being getting concurrency without the need for actual parallelism?