"Learning Python 3 is not in your best interest" REALLY? Learn Python 3 and you can work your way around Python 2 code if needed (except for Unicode problems which are tough even for people accustomed with Python 2 and which is a sore thumb that needs to be fixed hence Python 3)

Yes, I though Python 2 was good and Python 3 was irrelevant. That was 5 years ago though.

Reading stuff like "The fact that you can’t run Python 2 and Python 3 at the same time"? Really? Fake news anyone?

It is possible and several people do that. Period