I've yet to find one I actually enjoyed my time on. I'm better off getting questions answered by just broadcasting in global chat in-game. The dorks and power-moderators of the channels for games are the same types of dweebs who used to lock forum posts asking questions with "lol search function n00b, LOCKED AND BANNED".
It's not bazarr so much from one perspective.
The biggest problems in forums are lack of engagement which leads to abandonment. That is why a lot of forums are shutting down. People are so used to centralization.
Discord users get notifications on a single platform for topics they subscribe to and since it is "always online" for many people when they boot their computers, engagement stays pretty high because of the low effort required. On the other hand, I have asked around 15 questions in various discord support servers and gotten 2 replies ever, so not that much different than forums...
Of course this leads to tons of information lost & locked away on a terrible deepweb platform. At least there are threads now so you don't have to search through random comments to see who replied to a question you searched...
Discord is horrible as a forum replacement, but I do see why it is replacing many forums from a theoretical engagement perspective.
Maybe we need an app that can aggregate all your disparate phpbb2 memberships and notifications. Beeper-style.