The WWW is supposed to be decentralized. There shouldn't be one (or a few) companies that host the Web. I don't want Google to visit sites on my behalf.
(Author here.) That's what's so great about the Web Packaging standard proposed in the article to replace AMP: everybody could use it. https://github.com/WICG/webpackage
Even HN could serve up prerendered Web Packages for all of the sites on the front page.
The result would be a more decentralized web.