Python Software Foundation survey finds that a significant number of Python developers are still using Python 2 for data analysis, computer graphics, and devops.
Well, TBF there is a lot of avenues to get locked into legacy software in python. I am still modifying and using Python2 code because the drivers and libraries for hardware are only available in python2 and the hardware developers wont spend the money and time to create Python3 libraries. So I am stuck using an airbridged, un-updated python2 environment until it gets to the point of updating/backwards engineering python3 drivers and libraries for all our hardware ourselves.
I guess I should have been a bit more specific as it is a closed source blob with a python wrapper that can't be updated without at least the headers or backwards engineering it.