My argument is Google took an alternative road here, like they did with SPDY and HTTP/2 development -- they developed an open standard and threw their weight behind it. I don't see how AMP is a walled garden since any and all other search engines are free to implement the standard as well. Content aggregators like HN can cache and serve up AMP pages as well.
The only controversial thing here is this: publishers' content is being cached and re-hosted on a platform outside of their control. This is a non-issue because publishers are opting into this system.
The only controversial thing here is this: publishers' content is being cached and re-hosted on a platform outside of their control. This is a non-issue because publishers are opting into this system.