It definitely is federated 🙂 https://matrix-org.github.io/synapse/latest/federate.html

Yeah I still hyper-focus, with or without meds 🙂

Oh yeah, I definitely feel this. I'm self-diagnosed a few months ago

You can make lists in Mastodon, eg to create different feeds with different types of people, it's like having themed timelines.

But I still agree with you.

I think I'm leaning towards Lemmy.