It still only has Python 3.6, but OpenCV and numpy are pre-installed correctly this time so you don't have to compile them which is an improvement.
I'm not doing anything with mine that involves OpenCV, I didn't realise one of its flagship examples was also messed up in the box.
Oh! And I just dug out my script to rebuild if I need to. I forgot a few more annoyances:
* tensorflow isn't installed by default, and it's not obvious how to do the install because you have to specify NV's repo: pip3 install --pre --extra-index-url https://developer.download.nvidia.com/compute/redist/jp/v44 tensorflow
* openai gym won't work unless you specify archaic version 0.15.3, there's a buggy interaction between it and NVidia's X11.
* lots of packages need installing that should really have come by default, or were broken by default [eg numpy]
If you don't need CUDA, you can outright use regular Fedora, which uses nouveau. (no reclocking issues or such on Tegra)