The company I was at the time tried really hard to move to python 3. It was a huge codebase with thousands of engineers. After more than a year of work they cancelled the project and said they'll never upgrade to python 3, and instead started writing smaller "microservices" around the core product just to calm engineers anxiety to use python3. Now Django is suffering kind of the same problem with all the async stuff being bolted on, adding a lot of gotchas and side effects and incompatibilities around every corner. It is a mess.
I left that company and I will never use python again.
I love how Ruby seems to care about the ecosystem, and both ruby and rails keep innovating and providing awesome full stack solutions.