Meta built an entire new ActivityPub server from the ground-up specifically to federate, and then decided not to. They don't need to actually federate, they just need the threat that they COULD federate. This is Art of War.

Elon knows what's right, but it conflicts with his mission to rule the world. This is a Cold War between Facebook and Twitter. It will last 20 years and nobody will drop the nuke. All we can hope for is a catalyst.