[davidkhess]

Ditto. I started out on Twisted back in the day and stayed with it for 6 years all they way up until they introduced deferreds combined with yield/generators (the same technique which is the heart of today's asyncio).

It was great at the time but ultimately tiresome. It introduced framework specific incantations all over the place and any framework using I/O had to be Twisted-aware in order to use it straight-forwardly. The exact same complaints I have today of asycnio.

I went to gevent 10 years ago and have never regretted it. If you have some reasonable knowledge of threading and synchronization then it is a really nice developer experience.