It has definitely been a painful process to port from python 2 to 3. We have one developer who has been pushing hard for this, and while it may not be a defensible business position we believe it's the right thing as members of the community.

There are some nontrivial improvements in Python 3 (async) that we want, but more than that we don't want python to split and languish. We think that by taking a step into python 3 (and porting our remaining dependencies) we can make a small dent.