Since then, I have learned new things, but not because they were "relevant" or "important", bit just because they were fun.
Python is a crappy language, and always has been. It's just a happy accident that the ML folks glommed in to it. Most frameworks suck, seriously, they are awful, victims of their own success.
Learn a clean, new language. Use it to solve AdventOfCode, just for fun. Get back to the fun in programming :-)