That would have helped a lot, yeah. Also, dealing with exceptions in an intuitive way when you have a "fake" stack you're managing yourself is a drag. The performance of of managing your own stack also sucks.

But probably the biggest practical issue is there is a terrible, common silent mistake pattern, that bit us over and over again:

    self.do_something_async() # it's a generator

What you really wanted to do was to `yield` this so the reactorish element in the frame above you consumes it. Instead, you created a NOOP generator that is never consumed, so whatever work you thought you did, silently.. does nothing.

Anyway, I think `yield from` helps you get around some of this stuff, but I haven't been keeping up with tulip. Which is probably kind of silly since Guido works like 50 feet away from me.

Btw, hi Donovan. :-)