I think the point was making sure that code won’t break in the future. If you tell someone „use python 2 to run my script“, you know it’s going to work basically forever because the latest python 2 won’t be changed. That’s not true for python 3. I still think it’s a bad argument, but that’s what I understood the idea as.
That argument still seems inconsistent to me, since saying "use python 2, pin your dependences and never upgrade python so your script runs forever" is the same as "use python 3.12, pin your dependences and never upgrade python so your script runs forever".
Although 3.1 also meets that criteria. And even with python 2, the dependencies could still update. The main thing is that it's the not-updating that will make your code run forever (on any system, language, version), not the fact that it's python 2.
