I think it's very important to address the reason why AMP is possible in the first place: Websites are so extremely slow these days. From users perspective, when I see the lightning icon on my search results I feel happy because it means that the page will show me it's contents as soon as I click it. It means that the website is not going to show me white page for 15 seconds then start jumping around, changing shape…
This created an opportunity for Google to come in and offer this solution and now we're stuck.