@j12t @pluralistic in short, IIUC:

"[[Bluesky]] lacks the one federated feature that is absolutely necessary for me to trust it: the ability to leave Bluesky and go to another host and continue to talk to the people I've entered into community with there. (...) 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."