I'm still on Discord because everyone else is there. I've moved my direct social connections, so most of the things I'd use Discord dms for on a daily basis, over to dedicated direct messaging services, but communities are so much harder to move over. You can't shuffle between a hundred and a thousand people over to another platform unless somehow most of the groups they're in move over at once.
And to what? Matrix communities are not as convenient, Revolt's voice chats are not as good and screen sharing wasn't a thing at all last I checked and it doesn't have a mobile client, and TeamSpeak is primarily voice-based.