Benefit for Google, locking people (making it easy to return) into their "platform" thanks to AMP bar and carousel and control over AMP and by extensions large

Benefit for Google, locking people (making it easy to return) into their "platform" thanks to AMP bar and carousel and control over AMP and by extensions large portion of the web. Twitter, I can't see benefits, other than what you mention i.e. tests show users preferring it. My premise is that there is a large enough group of people who would prefer to opt out. I have no idea how large or small this group is.