Re: some people may find this appealing
To be fair, even traditional mail included occasionally things that weren't strictly letters - postcards, illustrated catalogues etc. Much of that may have always been spam to many, but not to all - believe it or not, I often find occasional full-graphic "now on sale" ad-mails from some of the specialized sites I actually shop at actually rather useful (ie. random stuff from Amazon: not useful - shop selling only books and DVDs or RC hobby parts: potentially useful). Of course, this is NOT to endorse AMP in any sense, just to be clear, and I fully support anyone's choice who wants nothing but text - I'd just like to counterbalance it by pointing out that for at least some of us "text only (not even HTML)" is not one but several bridges too far.