Malte Ubl:
TL;DR: We are making changes to how AMP works in platforms such as Google Search that will enable linked pages to appear under publishers’ URLs instead of the google.com/amp URL space while maintaining the performance and privacy benefits of AMP Cache serving.
Nothing significant has changed; you still cede content control to Google.
Do not use AMP.
Nick Heer:
Consider this: Google owns the most popular search engine and the biggest video hosting platform in most countries, operates one of the most-used email services on Earth,1 has the greatest market share of any mobile operating system, makes the most popular web browser in many countries, serves the majority of the targeted advertising on the web, provides the most popular analytics software for websites, and is attempting to become a major internet service provider. And, to cap it all off, they’re subtly replacing HTML with their own version, and it requires a Google-hosted JavaScript file to correctly display.