After reading the comments on several communities including Lemmy, reddit, YouTube and several others, I don’t get the feeling that FOSS users are as enthusiastic about discord as you portray. Has it ever occurred to you that perhaps it’s a restriction that you impose on your users?
Besides, all the bells and whistles of Discord don’t solve the biggest gripe that I have with it - the searchability and discoverability of questions and answers. Despite the history recording in Discord, it acts essentially as an information black hole. People’s efforts in solving problems are just lost because they can’t be found again.
And finally, there’s one thing that corporate social media has proven time and again. Eventually all of them pivot for some reason or another. Perhaps they want to monetize the platform on unacceptable terms (like reddit recently). That will happen to discord too some day. They are holding the community content hostage. Don’t make the mistake of thinking that they won’t ever try to make money off it, cutting the community from it.