AMP is an interesting project. In my view it has one important drawback: You MUST load content for your webpage from the AMP cdn. This means your visitors are automatically tracked by a third party (even if you have no webfonts of google analytics). So this would be a no go for government, medical, privacy rights, and so on websites. It probably won't matter for the majority of sites, as they already load js, webfonts and analytics from a cdn.