Mastodon and other extinct creatures

FWIW, I'm on Mastodon here:

https://mastodon.social/@fflavio

It hasn't gone the way of all the twitter would--be killers, at least yet, but although it does look like it has a busy core of people, I don't know anybody in it so posting there feels a little bit like the wheel-man in Kentish Town going round on his monocycle stream-of-consciousness haranguing the crowd of passers-by.