[cjs_ac]

They still used it, they just didn't contribute. It's not that StackOverflow is useless, but rather that it already answers most questions.

[rienbdj]

That, and genuinely new questions get aggressively shut down.

[Someone]

Given the speed at which tech evolves, I do not see how that can be true.

I think it may answer most questions from five years ago, but I would phrase it as “it has answers for most questions, but many are outdated and there’s no easy way to tell whether an answer is outdated”

[mixmastamyk]

"Rank by recent votes" has been a feature for perhaps five years already.