I loathe Discord for (non-dev but still software-related) community management but we tried launching a forum and realized users don't care and just want Discord or Slack. It's now in the "familiar" zone and registering for a forum sucks. They don't care that it's hard to find answers, or any of the other reasons listed here, many of which were our motivation for starting a forum. We ended up dividing users and now have a dead forum with a banner directing people to our Discord :P