Ok. So the first problem is that people would end up optimizing for entirely the wrong thing. Rather than optimize for the machines and networks that are actually in use, you'd optimize for high CPU Linux servers with no GPU connected over high bandwidth and low latency networking. Not low CPU mobile phones over LTE or dodgy WiFi.
Second, you wouldn't complain that it's an unfair advantage to pages in the Google AMP cache, due to a better network location? An unfair advantage to pages hosted on GCP? An unfair disadvantage to iOS due to there being no iOS server hardware that could be used for testing?
Second, you wouldn't complain that it's an unfair advantage to pages in the Google AMP cache, due to a better network location? An unfair advantage to pages hosted on GCP? An unfair disadvantage to iOS due to there being no iOS server hardware that could be used for testing?