Why is ActivityPub “the” Fediverse? “Fediverse” is very broad and encompasses multiple protocols, a lot of which predate ActivityPub becoming commonplace.
The original Fediverse apps are still around and don’t use ActivityPub. For example, StatusNet / GNU Social use OStatus and Identica uses Activity Streams / ActivityPump (which was the protocol before ActivityPub). diaspora (if it’s still around) used its own protocol too.
Some of the older apps have adapted to use ActivityPub, while some of them still exist in their own separate part of the Fediverse.
Why is ActivityPub “the” Fediverse? “Fediverse” is very broad and encompasses multiple protocols, a lot of which predate ActivityPub becoming commonplace.
The original Fediverse apps are still around and don’t use ActivityPub. For example, StatusNet / GNU Social use OStatus and Identica uses Activity Streams / ActivityPump (which was the protocol before ActivityPub). diaspora (if it’s still around) used its own protocol too.
Some of the older apps have adapted to use ActivityPub, while some of them still exist in their own separate part of the Fediverse.