If the forum features were used properly it’s not really any different than a traditional discourse forum board. Also being proprietary isn’t always a bad thing, and this is coming from an open source enthusiast. There are alternatives like guilded and another one called riot (not to be confused with riot software).

Edit: anyone want to explain why the down votes? I’m not wrong, you can create forums, pin posts, create forum categories and tag posts, it’s not a black hole if you take the effort and not make it a black hole. People just like to bitch and moan because “discord bad!”. Fuck off with that shit.