[wbronitsky]

You make a lot of arguments here, most of which I won't touch (especially saying China is "a dream for both consumers and stores").

But to answer your question: no, we should not have 0 bounds on what is acceptable, and there should be some guardrails to make sure that the pedants in all of us don't take over, and that our economy doesn't end up running on pennies (not that they would, that argument is marginal at best). However, not accepting cash is a problem of a different magnitude than not accepting some annoying forms of cash. I support a ban on cashless stores, but, yes, like you pointed out, with some caveats on what they have to support and what they don't.