Well, an issue is that #Bluesky seems more focused on users than on instances, so when you talk about Bluesky adding federation, it's not clear that's even a thing in Bluesky.
Since Bluesky apparently ties users to instances a whole lot less, it makes for a conceptual paradox to talk about federating with Bluesky instances that sort of don't exist in the same way.
There may be sort of translators between the two systems, but if they operate on entirely different core mechanics, it wouldn't be transparent.
@volkris well, if bluesky federates with activitypub through a bridge then I guess we're really talking about the bridges ability to federate and then people's ability to block said bridge