Seems like it would be a pretty natural fit in many embedded scenarios— particularly where your entire program is basically just a bunch of threads waiting for

Seems like it would be a pretty natural fit in many embedded scenarios— particularly where your entire program is basically just a bunch of threads waiting for things to happen. FreeRTOS is that anyway, except it's longjmping between heap- or statically-allocated stacks, and you have to unblock worker threads by poking them from ISRs. All of this is workable but I could definitely imagine it being more sane with first-class language support for the fundamental cooperative multitasking model that's at work.