@mcc The way Bluesky works is different in many ways, when you compare it to a Fediverse system. The PDS is only one part of it and AFAIK it doesn't include the frontend. The next part is the handle and it isn't bound to the PDS - that's the difference to the Fediverse. This is a concept, that I find really nice.
However: There is a single central component in the whole concept: The handle directory. I would like to see, if Bluesky will change something about this.