I never used twitter, I tried to use mastodon about a year ago and hated it, I joined bluesky a few weeks back and love it.
Mastodon gives you an autoscrolling firehose of unfiltered junk on all, or an empty wasteland of subscribed tags, with nothing inbetween. I never found anyone I wanted to follow while sifting through screenfuls of firehose, so I didn't bother.
Bluesky has nice UX, the posts on Discover are mostly engaging content, there's a bunch of people i've heard of over there, tags are encouraged via feeds, the starter packs are nice and the blocklists are amazing.
Will it enshittify eventually? Sure.
But then you just move on to the next free trial.
It took me a week to find a bunch of lefties, journalists and shitposters on bluesky; whatever comes after it will doubtless be just as quick. They're a fungible commodity - if I can't find the same specific set of people on the next one, ehh.