Or even better, they could've used usenet. Usenet has all the benefits of automagically scaling (due to federation) and no worries about the issues of self-hosting (security, updates, etc) but also isn't run by any single company or person. The open protocols of the past are so much better than the proprietary corporate software services of today.
I have been wondering why Usenet and IRC haven't experienced a resurgence. Discord will be the next casualty of corporate greed. It's really a fallacy that these communities are moving to yet another corporate-controlled entity.
But yeah, the fall of Discord is coming. The enshitification process has begun. Their forcing users to use unique usernames still baffles me.