Yeah, that's why I was wary of being reductive/dismissive - but there's a lot to be said for a protocol that exists and has traction (and where the quirks are k

Yeah, that's why I was wary of being reductive/dismissive - but there's a lot to be said for a protocol that exists and has traction (and where the quirks are known). Although you could probably say (quite reasonably) that some Mbox variant would meet that definition also. I certainly wouldn't object to such a thing!