Something like talktoyoutuber would also be very useful for certain discord servers. They'll have a lot of knowledge on something but will gatekeep it with "just use the search." and they'll refuse to build a wiki or really engage in any kind of organization.
I can cook it up if it would actually get some users.
Ultimately, I want to make a tool where you can plug in any arbitrary document store/scraper to an LLM with RAG. But I think we are still not there yet in terms of all purpose scrapers.