#Bluesky's #AT_Protocol seems to be pretty complex. And its #federation may even be called "centralized by design", as it is designed to "[send] messages to a much smaller number of big aggregators, which then broadcast that data ... across the network."

> On a technical level, prioritizing big-world indexing over small world networking has multiple benefits.

It does ... if every node interacts with every other node on behalf of every one of its users. But if a PDS at pds.example.net mostly interacts with the fifty or so instances where its users have contacts while rarely to never interacting with 10,000 other instances, it doesn't need the BGS firehose, and it can integrate "app views" for its users directly into the same server.

https://blueskyweb.xyz/blog/5-5-2023-federation-architecture [blueskyweb xyz]

Also, even most US companies know to use ISO-style dates (YYYY-MM-DD) in URLs, not US style or European style.