StackOverflow is moribund pile of junk. They've never managed to understand that software development is a highly fluid, constantly evolving space. Instead of embracing this, they've been trying to build a static encyclopaedia.

Volunteer admins with nothing better to do get their dopamine by closing questions for StackOverflow points, regardless of whether the supposedly duped question from 8 years ago is actually still the best answer and covers the nuances of the question now being asked.

There probably is still a space for a SO-style site to exist, but they'd need a drastic change of approach. LLMs (+ Reddit I suppose?) have taken over most the engineer support role.