I find it hard to think of anything that doesn't run on Python3 by now. The only thing that's still good about Python2 is that it's much faster. I always hope for a release that addresses that.
Do you have more info about how Python 2 is faster than Python 3? I had understood that it was faster for some stuff but slower for other stuff. This benchmark says they're roughly the same: https://speakerdeck.com/pyconslides/python-3-dot-3-trust-me-...
Thank you for posting this. Pages like that are nice for pointing out to people who don't have issues that many of us do. I think people tend to forget that most programming languages are not single-purpose and can be used in widely varying environments for significantly different purposes.
Twisted is a pretty big dependency. The entire stack that I work on depends heavily on Twisted, and we use a lot of it, so until it's ready on Pyhon 3, it'll be hard for us to move.
We also depend on Paramiko, which is also red on the WOS.
Twisted is a bit of a bigger matter. A lot of the Python 3 tasks have been closed, but it's a pretty big beast, with lots of corners for bugs to hide in.
Which I think is pretty revealing about the state of Twisted and gevent.
I know from experience that gevent is not in a healthy state of maintenance. There have been some recent commits that indicate it might get better eventually, but I would not design new code to use gevent.
