

So, bluesky works differently to fedi.
A PDS stores your posts/comments/likes/blocks/articles/whatever. These all get crawled and saved to a relay.
An appview connects to a relay and sorts through all the posts, and indexes them.
They handle all the interactions, rather than passing messages between servers.
There’s a good few small ones.
It can work without relays anyway, an appview can crawl PDSes directly.