Google's Accelerated Mobile Pages (AMP)
Google has a new 'measurement' tool to see if your web pages are mobile compliant. I looked at the documentation and got some of my lagging sites to where it should be even though 95% of our sites are already mobile compliant. Even with my adjustments / fixes you get this message:
Google wants to force a standard among web developers by making you insert their compliant code / standards. I agree about pages loading faster for people who don't have fast access but like you I disagree with having to add external JS to accomplish that.