I was on a few of the social media sites briefly and dropped out because I didn't like any of them much. I gave Twitter a second chance after Musk bought it. I got about as far as following Musk, SpaceX, and a couple of space agencies, and reading a few tweets while posting nothing yet, before getting my account temporarily disabled, with a demand for pictorial ID, for "suspicious activity." (Reading is apparently a very suspicious activity to certain parties.) I told them they weren't getting any ID and they should kill off the account. They kept sending me new-user suggestions while preventing me from logging in to turn off the useless emails. I threw all Twitter/X email addresses in the spam trap. Curtain.
It was relatively early and I figured maybe Musk hadn't cleaned all the Lefty Censors and their systems out of his purchase yet. Maybe. But I was still radically unimpressed and untrusting. There will be no third chance.

Hi! Welcome!

Aw, I hope he or she gets better.

Pleasing memories brought into the present and still active, rather than something lost.

Welcome!

When I change contexts, I change 'nyms. I never crossed into RL in the majority.
Most of my old pseudonyms are dust in the wind now, along with the contexts I was using them in.

Hi! Welcome! Love the flower pic.

I read the TOS and found the rights claim potentially too broad.

Because many social networks are dishonest censors and radically untrustworthy.

It's not necessary for me to disconnect. It's just that I'm doing a very long, slow wrap-up on my most recent online project and presence. Maybe there'll be another. I'm poking around to see, because this isn't the justly lamented '90s Internet anymore and it's now hard to locate online places to settle that aren't hostage to a corrupted oligarchic establishment.
Not a Bitcoiner. I will never be a Bitcoiner, or at least I will never admit to it, because, with my philosophy, naturally I will never willingly write anything that must ultimately attach my mundane name to an uneditable public ledger. This makes nostr an awkward fit in some ways. But it's not obviously unworkable.
What I most regret, over the decades, is some of the unintended disconnections from people I liked. When the common activity ended, we exchanged contact info and went our separate ways for a while ... and, eventually, even with people who don't intentionally fade from public view as I do, the contact info no longer works. I should have acted more quickly to keep those contacts live. But I didn't foresee the ephemerality of life online, back then.

Most other people don't seem to be able to get friend groups to shift, if the original venue is still functioning. Cue "I don't like it but I guess things happen that way."
I haven't tried to bring anybody. Long time ago I developed the defensive habit of altogether abandoning my old handle when I sought out a new activity. This is because I first got online in the Wild West Internet days, and it didn't take me long to realize that a) good people I never would have met, and bad people who never could have noticed me, were now both in range, and b) there was no practical defense against an obsessive evilminded lunatic from out-of-district; pre-Internet law enforcement wasn't set up to cope. Pseudonyms that only last for a time could make me hard to follow around. Just in case.
(Now we have got an establishment that has decided that what's important is not protecting the serfs but suppressing them. Worst of both worlds, in certain ways.)
Maybe nostr'll serve. I've considered dropping offline altogether except for practical stuff, too. That seems a little drastic. But it's now on the table.

1. I have a list of projects and tasks to touch most days. I have too many at the moment, so I've found it useful to make sure they get short sessions to keep them in memory, rather than letting enough time pass to let me start forgetting what I was doing. I get to most of them most days. I work on one project till I get one item done or in a position to leave with a note, or until I see I'm not making progress that day and try again tomorrow. Perfect consistency is not necessary.
2. If I'm not working productively on anything much I take a day off.