I'm still on Twitter, though a lot less lately. There are still accounts there that aren't on competing platforms (especially anime and tokusatsu properties which I am interested in following).
Insta/Threads provide me with a lot of funny videos that I don't ask for but still find them amusing. Instagram is infuriating to me because I like a good timeline and the posting date/time is totally obscured and often out of order.
Bluesky is nice, but for some reason doesn't feed me what i want to see. The great thing about Twitter in the old days (before it got way toxic and most of my time was spent doomscrolling) is how easy it was to get news and posts I was interested in. I feel like I really have to search more on Bluesky at the moment anyway. I don't do political news on the blue bird anymore and that helps, but I wish Bluesky had more of the content I want (and displayed it to me in a way I prefer).