I'm not objecting to credit cards and promoting cash instead -- I'll happily support a total cash ban (quite an unpopular opinion around these circles, I believe, but that's a story for another time). I'm objecting to the cost of 2-300bps on credit cards, when it is trivially shown that they can be 30-50bps (Alipay, EU caps, etc) and everything will work just fine, just without 2% cashback.