I'm in operations and I've spent much of my career writing code for the Python that worked on the oldest LTS release in my fleet, and for a very long time that

I'm in operations and I've spent much of my career writing code for the Python that worked on the oldest LTS release in my fleet, and for a very long time that was Python 1.5... I was really happy, in some ways, when Python 2 was announced as getting no new releases and Python 3 wasn't ready, because it allowed a kind of unification of everyone on Python 2.7. Now we're back on the treadmill of chasing the latest and greatest. I was kind of annoyed when I found I couldn't run Black to format my code because it required a slightly newer Python than I had. But... f strings and walrus are kind of worth it.