@bitnik @jupiter_rowland @valhalla @jakob @cstross
In this regard (apart from interaction model), ActivityPub is more like old FTP, rather than SMTP+MIME, NNTP, the WWW, and the "social networks".
That is, AP does not try to ensure that a message sent by a user from a compliant server can be read faithfully (apart from non-semantic layout and looks) by recipients in every other server. Because the sender may use a message format that the receiver can't properly handle.
Is this correct?