Well.... I have to say Twitter is definitely shrinking. There has been a mass exodus (me included) to BlueSky. My Twitter account is still open, but I will close it at some point.
I have so many followers but I am seeing a lot of familiar names on BSky. Starting again is the right thing to do, the toxicity on Twitter now musk is in charge is off the wall. He is now also allowing users you block to see your posts. I am just not getting the useful stuff on my feed I used to, it is now very manipulated with right wing crap.
BlueSky sign up has surged since Trump won, and is over 15M now. I have looked at Threads, Mastodon over months but this is the only place I feel comfortable and useability is really easy and reminds me of Twitter from years ago.