If you read closely, you will notice that due to the enormous amount of power that Gmail has, they cannot refuse to serve emails with AMP content in the end.
Yeah - our duty is to serve the needs of our customers while making wise and pragmatic security decisions to keep them safe. If large amounts of email that people want to see is delivered via AMP pages, we'll make them viewable and usable somehow - hopefully in a way that makes it clear that they are mutable, and maybe even informs users if they've changed since last view.
> "...hopefully in a way that makes it clear that they are mutable, and maybe even informs users if they've changed since last view."
That would be amazing, and as a happy Fastmail customer I'd love to see it implemented. I am in full agreement with your blog post, and Google's AMP-email plan only further cements my position to excise Google from my life as much as possible. As much as I love seeing new and emerging technologies, there are times when one must say "that's too far".
Well, they could. AMP content is basically for email marketing and that's about it. Showing updated marketing brochures, deals, or ads within actual email content. It's nothing that the vast majority of users actually want or need. But marketers and spammers really really want it.