Wild speculation (I'm relatively new to Python), it might also have to do with the Python community having several personalities.
Python 3 solves a lot of problems for me, as someone who does a lot of NLP work, and generally has to deal with strings from the outside world and multiple languages and all that on a more-or-less constant basis. I imagine it solves some problems for Web developers, too, though possibly to a lesser extent. But I don't see a whole lot of devops people being eager to jump off of Python 2, and I'm not sure I see it solving more annoyances in that domain than the process of migrating to Python 3 would create, either.
Agreed. My background is also in NLP and I made the switch to Python 3 early and enthusiastically because it resolved a lot of issues around working with multilingual text.
Python 3 solves a lot of problems for me, as someone who does a lot of NLP work, and generally has to deal with strings from the outside world and multiple languages and all that on a more-or-less constant basis. I imagine it solves some problems for Web developers, too, though possibly to a lesser extent. But I don't see a whole lot of devops people being eager to jump off of Python 2, and I'm not sure I see it solving more annoyances in that domain than the process of migrating to Python 3 would create, either.