People may not like a compromise approach, but I've switched to using standard IMAP-based mail readers with gmail. If more people did that instead of using the gmail app and web site, Google would maybe see that AMP'd email wouldn't reach a large number of their customers.

Then again, maybe AMP is their solution to this third-party interface "problem": create an incompatible "feature" that will encourage or force users to abandon standards-based tools.

Kind of like what's happened with Google Talk. God I miss the Mac's Messages app being able to interface with my work's gsuite chat.

FWIW, the iOS email client has improved a lot over the last few iOS versions. Worth checking out if you haven't looked at it for a while.