No, my thinking is along the lines of what you're describing (generate the key on the Y5 Yubikey so that it never leaves it). The discussion of one-time stuff i

No, my thinking is along the lines of what you're describing (generate the key on the Y5 Yubikey so that it never leaves it). The discussion of one-time stuff is just as backup for scenarios where I lose the key, which I invariably will, or need to give other people "break glass in case of emergency" access to the servers.