My favorite is people downvoting and arguing about answers I posted over a decade ago. "Yeah, I know that's not how you'd solve a problem in Python today. It was a good answer in 2011 when I wrote it. How bored are you, exactly, that this is how you want to spend your days?"
And for more than a decade they've been closing all attempts to ask the question again as a duplicate of that 2011 question. Relitigating the answers to the original 2011 question is the only way to achieve the goal of that 2011 question being authoritative.
SO's ideals are great but everything about it is broken in practice.