At any rate, the future of social networking is not the fediverse, it's Nostr. ActivityPub simply has too many architectural shortcomings to be more than a novelty, in particular, you cannot guarantee that your audience receives your messages to them unless they're restricted to a subset of the network's servers. The fact that your identity is owned by a server admin is a centralizing force on the network, and different groups isolating from one another is a fragmenting force. It may be the case that such an architecture becomes standard, but it is not ideal, and seeing as it is early days with these social networking alternatives and there's already an architecurally superior option leads me to the conclusion that the fediverse will be eclipsed relatively soon.
[1] https://blog.mozilla.org/en/mozilla/we-need-more-than-deplat...