I'm against AMP by principle. AMP pages are hosted on Google CDN servers. If AMP use gets widespread, a chunk of the internet will then be exclusively hosted by Google. Google can then rein the internet at will. Their news aggregator already only serve AMP pages. Their search engine heavily promotes them as well. Responsive design is better since it leaves webmasters in control and you maintain a free open market for information. If we transition to an AMP world the last remnants of freedom and access to the crowds will be determined by Google. IMO the best thing we could use right now is a new distributed, decentralized open source search platform instead of Google.