AMP is one of the most frustrating experiences I've had with Google. the fact that it's foisted on users, with no option to disable it, makes it borderline infuriating. If you're stuck on an AMP page in your mobile browser, you can click on the browser's "Request desktop site" option to load the full page.
If I didn't know this was for mobile browsers I would think it was a gift to blind users who do not use GUIs.
amphtml links also provide an easy way around paywalls, most of the time.
I have no idea what is the true purpose of these amphtml links. It sounds like it's some advertising nonsense.
As a text-only browser user I see no ads and experience no page load delays, but I do see how overstuffed web pages have become.
In this regard, amphtml is a breath of fresh air.