If the metrics Google collect indicate that visitors prefer quickly loading pages, that should be factored into the decision as what external resources to link out to.

The evidence that visitors find bloated pages an issue is slowly growing, from Amazon quantising the financial loss of slower loading pages [1], to more recently, Life Hacks taking advantage of GDPR-triggered quicker-loading less-bloated European-versions of news sites [2].

I guess the question worth asking is if a non-AMP page is objectively more-performant than an AMP version, does Google prefer the publisher to keep the slower AMP version?

In a sense AMP is user-focused, validating Jakob Nielsen's prediction of the end of Web Design, because "people spend more time on other sites" [3].

[1] https://www.fastcompany.com/1825005/how-one-second-could-cos... [2] https://lifehacker.com/to-make-websites-load-faster-browse-t... [3] https://www.nngroup.com/articles/end-of-web-design/