It's irrelevant, no body uses it

Bluesky is not a real decentralized system as the company behind it say. Bluesky (the company) controls most key parts of the network, and it is basically impossible to setup a really decentralised alternative provider for the ATProto network, like you can do today with ActivityPub (Mastodon) or Nostr.

Sure, you can setup you PDS and own your data, but it is useless without the Relays and a self-hosted Firehose, and running you own website is basically impossible.

And lastly, let's keep in mind that BSky is a commercial entity, not a no-profit like Mastodon or a commmunity effort like Nostr.

And yes, I am ignoring the political toxicity of the network because I think the technical aspects are bad enough.

Multiple people have set up their own relays (which, by the way, is the firehose), and multiple people have set up their own application backends (which I think is what you're calling the relay)

It's fully possible to stand up the network on your own infrastructure, and to communicate with other providers