Comment by oasisaimlessly

That paper (P1364R0) was contentious, and I regard it as being severely motivated reasoning, published only to kill off competing approaches to C++ coroutines.

Some discussions of that paper:

* https://old.reddit.com/r/cpp/comments/1jwlur9/stackful_corou...

* https://old.reddit.com/r/programming/comments/dgfxde/fibers_...