Regarding the alleged missing features of ActivityPub
There are significant differences in account portability. ActivityPub allows you to transfer your followers to a new server, but not your content.
FlowVoid
joined 2 years ago
only rich folks or those who are willing to accept money from venture capitalists
Or non-profits that are willing to accept money from supporters.
ActivityPub already existed when they started BlueSky. They chose to not make their protocol compatible.
Because AT protocol has features that are incompatible with ActivityPub, and those features are important to some users.
Your content in ActivityPub is linked to the home instance. So for example I can't move this post from lemmy.world to another server. I could copy/paste the content into a new post on another server, but it would be a broken piece of our conversation with no context or replies.
Also, hosting a ATProto self-instance is not as expensive as you suggest. This person did it for $150/month.