That's why Ritchie is very active on, and often refers to, Stackoverflow as well! Exactly to document frequent questions, instead of losing them to chat history.

microsoft copilot can summarize discussions. with some orchestration it could extract even from past discussions question+answers and structure them in a stackoverflow-like format.

source: we use this feature in beta as part of the enterprise copilot license to summarize Teams calls. Yes, it listens to us talking and spits out bullet points from our discussions at the end of the call. It's so good it feels like magic sometimes.

note on copilot: any capable model could probably do it. I just said copilot because it does it today.

there are projects that you can use to index discord servers, unfortunately a lot of communities just don't use them.

Why would they? A person who picks Discord has no idea what knowledge discovery is.