ActivityPub and ATPro need to fully interoperate. A Mastodon user should be able to follow a BlueSky user and vice versa.

It’s insane that this is not possible today. My iPhone on AT&T doesn’t care if you have a Samsung phone on Verizon. We can just talk to each other.

Twitter, Threads and Tumblr have financial interests in blocking interoperability. Mastodon and Bluesky do not have those interests. So what’s the hold-up?