>>54633762Bluesky seems to be on track to become the most used replacement, but like you said, it still needs some key things to explode (mainly stop being invite-only). I actually really like misskey a lot in terms of functionality, and it actually has a considerable japanese crowd already. However it doesn't seem to be available in EU/UK for compliance shit, so that might stop its growth.
Anyways, here's a cute Selen for going offtopic.