Activitypub is the federation equivalent of an at-home 3d printer. It’s easy enough to understand how it works and do stuff with it. And very hackable. Bluesky is trying to be more like Firefox: it’s much more complex and built by experts to be well optimised for the problem it’s solving. But it’s much harder for lay people to understand how it works internally.

I feel like that is extremely uncharitable but you are entitled to your opinion.

Well, you are more public persona than I, so you have to be more diplomatic :)