WebSub literally does the same thing, except ActivityPub cuts away the middle layers, removing some redundancy on the way. It makes ActivityPub less of a protoc

WebSub literally does the same thing, except ActivityPub cuts away the middle layers, removing some redundancy on the way. It makes ActivityPub less of a protocol hodge-podge than OStatus, which has the same drawbacks and benefits as any introduction of a dependency into a protocol or software.