Forums channels, added a few months ago to discord, have shown a few good uses. I’m personally quite a fan of them when properly used and moderated. A lot of communities seem to not fully understand their power yet, but once you have a good setup they can make certain channel significantly less chaotic.
The types of channels that I see are easily replaced by forums channels are channels in which multiple individual chats/discussions take place. These are channels like help/support channels, but also suggestions/feedback channels or even bug/issue report channels.
One can also use them for some kind of listing, like recipes or images. The thread then is used for reactions/comments on what the OP made. However this tends to make the channel feel less “alive” and “welcoming”. It definitely helps with organization but has some significant downsides for such channels. I don’t see forum channels replacing such listing channels very soon.
This server, being mainly focused around support and help, can greatly benefit from forum channels as an alternative option to the regular support channels. However some reorganization will be needed. A good step might be merging all the different modpack channels to 1 forum channel, which has tags for each modpack and requiring you to add one tag to a post.
This is what I think of forum channels in discord. They have their purposes and goals, and can be integrated well in some servers, depending on the goals of said server.