AMP header breaks even Chrome UX for me.
It somehow ends hiding the address bar and replacing it with the AMP one once I've started to scroll down, and the only solution is to scroll all the way to the top again.
I have the address bar set to never hide, which makes this even more annoting.
I’m pretty okay with google substituting ssl/dns/content even for their cash flow, I don’t care until they turn my browser into common-standards web crap. It turns safari into chrome, which I tested on an expensive sony sevice and couldn’t stand any more than two days.
Edit: I know that my “don’t care” is not popular among hn users, but it resembles regular non-tech folks thinking — amp is that thing on some sites that annoys you when you scroll and share links. 98% of us really don’t care and notice inconvenience only.