May you explain this, because Google can't even ship their browser engine (Blink) on iOS and have to use WebKit. Why hasn't the world coalesced around WebKit?
I think that matters because while Chrome has a number of great engineers, it's a single team at one company and the web should be bigger than that. We've seen many examples of a Google-proposed spec which became better with feedback from Mozilla or Apple engineers, and that makes the web healthier overall. One really interesting example here has been with tracking where every browser which Google does not control has a better privacy stance because none of those companies make their money by tracking people.
iOS is not the entire ecosystem. Blink dominates everywhere else.