Bots are still a thing, certainly, but much like in IRC, they're still usually triggered by devs (of course some users will use them, but then, those aren't the users who need to be pointed to the FAQ)
There's also stuff like server intro guides and onboarding steps that should deal with most of the low-hanging questions... Should, but don't always :P
As for use of LLMs... probably an interesting use-case, but I'm not aware of any solutions using that quite yet.
Okay but I don't blame users for that particular failing - topics are not easily discoverable. They should be shown above the input bar the first time a user visits a channel or until they dismiss it or something.
There's also stuff like server intro guides and onboarding steps that should deal with most of the low-hanging questions... Should, but don't always :P
As for use of LLMs... probably an interesting use-case, but I'm not aware of any solutions using that quite yet.