And that's what I meant by saying that I couldn't see what else to do without sacrificing usability. Whatever that language you propose would be, if it doesn't

And that's what I meant by saying that I couldn't see what else to do without sacrificing usability. Whatever that language you propose would be, if it doesn't allow use of state from the server, then it's pointless. You may as well use the local shell in scp's invocation.