The point is that they will not leave discord for „a FOSS discord“ because they‘d gain nothing. For the average user, discord won because it had a lot of featur

The point is that they will not leave discord for „a FOSS discord“ because they‘d gain nothing. For the average user, discord won because it had a lot of features and properties that where better than what was there before (voice & chat combined, not server management, etc). You and me might care about software being FOSS all day long, but the masses don’t. For them it’s just not a thing. I‘d guess „selfhosted servers“ actually is a step backward for the majority of discord users.