That's a great plan until you're locked out of all your devices with no backup.
I think the implication is that you should own multiple client devices capable of SSHing into things, each with their own SSH keypair; and every SSH host you interact with should have multiple of your devices’ keypairs registered to it.
I think the implication is that you should own multiple client devices capable of SSHing into things, each with their own SSH keypair; and every SSH host you interact with should have multiple of your devices’ keypairs registered to it.