[anonymars]

How do you suggest we just "make threads less wasteful"?

I mean, I suppose we could move the scheduling and tracking out of kernel mode and into user mode...

But then guess what we've just reinvented?

[rerdavies]

Colored functions. (Just thought I'd add that, because despite the rhetorical question, it took awhile for me to come up with the answer).

[pocksuppet]

Goroutines? Java virtual threads?