@daniel @pixelschubsi @tris I don't know much about Google, but in ActivityPub identity is an URI and it can't be used across multiple protocols. It can be linked to other identities, but this is not the same as single identity.
For example, while working on my ActivityPub project, I have to use 3 additional communication protocols: Matrix and XMPP (for group chats and encrypted messages), and E-mail (for notifications). This is ridiculous! I want a single identity and a single application for everything.