So I've been catching up with the @forktogether wiki, and the gist seems to be to run a project like a Swedish förening. This is fairly common in larger free software projects, and potentially a good way to avoid some issues Mastodon currently has (namely the very poor truck factor). Or perhaps it's just overkill bureaucracy, who knows.

There are some things in the list of requirements may not be possible, given how both OStatus and ActivityPub work. Blocking federation for certain instances is potentially one of these, modulo authentication stuff.

Accessibility sounds good. Probably requires a UI written from scratch to be maximally compatible (not relying on JS for example).

I don't see any code yet, but that seems to be because what to fork off of isn't decided yet. So a cleaner codebase like Pleroma could be an option. Plus that's written in Erlang, which is clearly the cooler language compared to Ruby (: