You guys can downvote me all you want for bringing up an uncomfortable truth, but the fact is that from the outside, it looks like there's still a huge schism in the Python community and that it's not at all obvious that users should be jumping into the 3.x tree to get miscellaneous work done.

As far as specifics, one of the first tasks I wanted to perform was to survey some of the NoSQL databases with some test cases that I would build in Python.

Mongo had a good 3.x driver and I worked with it. Great... but then these drivers all put me into a brick wall trying to use 3.x: couchdb, pycassa, happybase, and cql. There were numerous others that I tried along the way, but I don't have notes on all the failures.

Now, rather than trying to be 3.x pure, I don't even bother checking. I'm just using 2.7 for this project.

He is not saying that 99% are not converted, he is saying the conversion rate is not 99%. E.g., the conversion rate could be 90%, or 80%, and his statement would be correct.