This update on Bluesky by @laurenshof is important. They are moving very fast now, as I was pretty sure they would (money changes everything).
https://fediversereport.com/last-month-in-bluesky-september-2023/
I could be all wet on this, but don’t think the Blue architects see federation the way the fedii folks do. While small ATProto instances could certainly federate, I think they envision a network of BIG, well-funded servers around the globe that are federated. That way, there is competition between …