[pcwalton]

If you're allocating a call stack per thread you might as well just use actual threads.

[anonymoushn]

This obviously doesn't work. Maybe you can try refactoring a console emulator that uses its stack switching primitive millions of times per second to use threads instead and let us know how well it runs.

[littlestymaar]

But you lose the async/await syntax (which I'm addicted to because it makes blocking point explicit, like `?` makes error explicit).