I think the fact AMP (cache) was at least initially broken for lots of people is very concerning; next there is duplicating and breaking pieces of the web (links!). In my opinion the AMP cache should be opt in then quite a few of my concerns go away.

To my knowledge, AMP - and thus AMP cache - is already opt-in. A few minutes of research suggests this is indeed the case.

Are your concerns addressed sufficiently?

Okay so as a user of Google how do I never see an AMP link again? I'm actually seriously thinking of moving to bing or duck duck go because of this!

That's what I was doing, because I hate scrolling on AMP pages.

However it also made Google useless. I may see an interesting page, but then notice that it had the AMP stamp, and no (visible) way to get the non-AMP page.

AMP made Google useless for me. Then I discovered DDG. And now I use DDG as the default search everywhere, because I get more relevant results than with Google! So I guess I should thank Google for ruining their search with AMP and opening my eyes to alternatives.

And publishers are strongarmed by Google because of the search rankings.

I wonder what the EU will thought of that.