A federation of multiple servers, each a peer to the other, has been on Bluesky's roadmap for as long as I've been following it, but they haven't (yet) delivered it.
That was worrying when Bluesky was a scrappy, bootstrapped startup with a few million users. Now it has grown to over 13 million users, and it has taken on a large tranche of outside capital:
https://fediversereport.com/on-bluesky-and-enshittification/
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