[hpcjoe]

This. So much this.

At the $dayjob, writing some python assuming late model 3.10.x, and discovering that the API has changed when I have to make sure it works on 3.6.x and 3.7.x.

Nevermind important libraries like pandas changing the API so some functions you 've used for years just disappear.

I've got 30+ year old perl 5, that just works. And is readable. I wish 2 year old python could just work.

[brazzy]

Say what you want about Java, but back- and forward compatibility have always been a big priority and part of its success story. No Java developer would be surprised at 30 year old code just working (ironically, it's more likely than for 10 year old code).