The open solution to a faster mobile web would have been so easy: Just penalize large and slow web pages without defining a dedicated mobile specification. That's it. This wasn't done in the past, slow pages outperformed fast ones on the SERPs because of some weird Google voodoo ranking, heck sometimes even desktop sites outperformed responsive ones on smartphones. If they had just tweaked these odd ranking rules in way that speed and size got more impact on the overall ranking there wouldn't have been any reason for AMP—the market would have regulated itself.
I'm wondering who at Google is responsible for AMP. Who created AMP's random specs (no external CSS but external fonts files, preference for four selected font providers, no JS but their JS, probable ranking preference of Google cached AMP sites, etc.). Why did they decide on the spec themselves and not as a part of an industry group? Again why didn't they just tweaked their ranking algorithm and btw, they could have also made Android's Chrome faster, it's still significantly slower than iOS' Safari. I'd be happy if this person could comment on the abuse of power (Sundar Pichai?).