When I say key, I'm obviously talking about the private key. It honestly seems like the only reason you'd want to rotate subkeys or have distinct ones for diff

When I say key, I'm obviously talking about the private key. It honestly seems like the only reason you'd want to rotate subkeys or have distinct ones for different devices. Otherwise you're going to be stuck with at least one perpetual key anyway. It makes GPG somewhat more usable after you're done issing subkeys on your super secure airgapped workstation, because now losing a key/machine isn't a death sentence to your perpetual forever-lived identity. But then again, it's not like you can't reply to a PGP encrypted message with "sorry i lost my keys new fingerprint is x, please use that one" and most people will just do that.