@rootwyrm @FurryBeta TLS 1.3 gives transport-layer encryption.
The fact that TLS isn't already universally a thing for email is annoying.
But the thing we're talking about (and why PGP keeps coming up) is folks want their emails confidential from their provider.
And, sorry, that's just not doable. Experts routinely reply to PGP-encrypted emails with plaintext, often quote-replying the email that was encrypted.