cross-posted from: https://lemmy.blahaj.zone/post/17686207
It’s a very long post, but a lot of it is a detailed discussion of terminology in the appendix – no need to read that unless you’re into definitional struggles.
Kuba’s link i that thread is good, it looks like there’s currently about 370 PDS’s – Bridgy Fed got an exception from Bluesky so is the only one that currently has more than 10 uses. https://blue.mackuba.eu/directory/pdses I know some people who just run the open-source code for Bluesky’s PDS (which is pretty straightforward) and some run other implementations.