My experience with Discord is that teams I've been on that use Discord often win (at League of Legends, hackathons, etc.) but that I dread other uses of it. If it's the support channel for an open source project I'd say 1/3 of the time I get to talk to knowledgeable people, 1/3 of the time I get to talk to unknowledgeable people, 1/3 of the time it is crickets.