[fiatjaf]

Yes, you are right.

The entire ActivityPub concept is flawed, but not because you would be left alone in your server, it's the opposite: since you're interacting with your friends, your friends' server would then fetch all posts from your server and vice-versa, it will be as if there was just one server, but maintenance costs are now duplicated and the discovery process is not great also.

These problems are less problematic the smaller the servers are, which makes me think the best structure would be one in which each user is its own server and just syncs to temporary syncing hubs when possible -- or maybe sync directly to other online peers they know.

Oh, wait, that's what https://www.scuttlebutt.nz/ does!

(Disclaimer: I don't use Scuttlebutt nor Mastodon nor anything like that, and I really thought about Scuttlebutt in the middle of my comment, not before.)