[jorams]

In the same way that Google stopped federating by no longer accepting connections from others, as long as most people keep their stuff at Bluesky they can also just close themselves off from others again. I don't necessarily think it is a big risk, but the only reason the web is resilient to this is that no single ISP controls enough of the network to take it "private".

Basically, until atproto is much bigger than bsky.app, the situation is not very different.