It's honestly wild to see this even being argued about in 2024. Ten years ago, I remember the discussions around FP being universally "yes of course it's better, but what's the best way to make it practical in the real world where you need side effects".

There are folks that think they can still reason about code being executed on 128 cores (AMD EPYC™ 9004).

I mean it's pretty trivial if you have referential transparency, which is what FP gives you.

Indeed, that is the point I am making.