I remember the reaction on the list when Python 3 was initially added and set (before Qt 5.12 was added). Felt like a universal sigh of relief. Then the discussion about which minor version to choose (3.7 was due in a few months at the time), but the general consensus was “just get us on 3, doesn’t matter which” so 3.6 it is.
My only concern right now is Autodesk potentially dragging their feet on this, which I really hope they don’t do. But they’ve also got a lot of other things on their plate.
A bit grumpy that their M2019 release is still using Qt 5.6.1 even with their several month delay that went into 2019, but maybe they’ll do something radical and upgrade it through. I remember Wayne and others being happy about the push to GCC 6.3 and finally being able to use C++14.
Python3 has been a topic brought up for many years and pushed off for other things. I'm kind of surprised how much progress they've made in moving these companies forward and keeping them roughly in step.