@LianaBrooks
Primary? Yes.
Only? Not really, but mostly.
I use #Mastodon as my primary social media, especially as I'm self-hosting my own server. I do visit #Bluesky and #Threads occasionally, but that's like once a week to check for replies and so on to stuff I cross-post via #Fedica.
Is it working for me? Yeah, in the main. Sadly the main reason I'd been using Twitter for pre-Musk was for the World of Warcraft community there. They never really migrated en masse, and very few came over to Mastodon sadly, but the ones that did and stayed are great!
Bsky sees the next amount of activity from me, and that is mainly World of Warcraft and very little else.
Threads is barely used.