HTML email is supposed to be just another part alongside plain text as well. Anybody who uses a plain-text email client knows that nowhere near 100% of HTML ema

HTML email is supposed to be just another part alongside plain text as well. Anybody who uses a plain-text email client knows that nowhere near 100% of HTML emails are sent with a sane plaintext part. A fair portion of the time, there just is no plaintext part, other times there claims to be but it is just the HTML source stuffed into it. I've even seen some marketing mails (Delimiter promotional emails are the ones I'm thinking of, but there are others) where the plaintext part is just a completely different older message, apparently because they forgot to update that part before sending it out. Now, I know plaintext users are in the majority, but I don't think you can reasonably expect the same not to happen to AMP for emails if they ever become widespread.