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IMHO: #BlueSky isn't decentralised or federated. The outage on 2024-11-14 is obvious proof. It may *look* decentralised and they definitely love to outsource traffic/storage costs by claiming that running your own PDS (Personal Data Server) is somehow something federated, but that's all smoke and mirrors. You have to go deep on [1] to find "networking through Relays instead of server-to-server" as their current implementation choice. THEY run the relays. No one else.

[1] bsky.social/about/blog/5-5-202

BlueskyFederation Architecture Overview - BlueskySoon, we’re launching a sandbox environment for federation. In advance, we want to share some technical details about our design decisions.
William Gunn

@jwildeboer You *can* run your own relay, it's just complicated and expensive and most people don't care. (Look at how many people just make an account on mastodon.social vs set up their own.) If Bluesky started to go the way of Twitter, it would be (almost) possible to migrate without losing everything, like you do when leaving Twitter. Let's see if that almost becomes an issue.