The signal to noise ratio on Stack Overflow has been low for a long time now, even before LLMs showed up. I was once a high-rep contributor there. Nowadays, I usually won’t even bother clicking web search results that lead there, let alone share my knowledge with them. (And with Cloudflare, which is now a man-in-the-middle between the site and its users.)
IMHO, the community could use a distributed Q&A network, with no instance able to interfere with anyone’s access to our accumulated knowledge.
Something built with Hyphanet, maybe?