As late as 2022, I was at a company still in the middle of "migrating" from 2 to 3. I wouldn't be surprised if the migration project was still going on. The system had gone beyond tech debt and was bordering on bankruptcy.
Python 3 came out in 2008. If the 2 vs 3 differences are still biting you you probably have bigger problems to solve (deprecated, insecure, unmaintained dependencies for example).
"Comes out" and "Ready to switch to" are two different things.
Your conclusion is correct but not because Python 3 came out in 2008. It was ready to switch to some point a few years later but we'll before 2025 (I don't recall when sorry I didn't do Python at the time!)
