Earlier quoted context omitted.
the knowledge of the first 11 bytes/characters of the unencrypted message. You probably know how that worked out for the Enigma.
I am not suggesting that email clients should entirely depend on OpenPGP email inherent resistance to oracle attacks, only pointing out that it exists. Presumably the Enigma operators were not putting their decrypted messages in envelopes before sending them off to their enemies. Efail was primarily a straight up plain text leak. Plain text attacks come in distinct categories. The block ciphers used in OpenPGP are ge…
I think when you're at the point in your argument where the bar you're setting is "immunity to the attacks that broke Enigma", you might as well just concede.