While they’re probably right from a consumer perspective, the article skips over the fact that accepting and handling cash is a significant cost for businesses, way more than the credit card fees. Delays in checkout, making change, counterfeit bills, employee theft, external theft, safe transport, added accounting burden…all add up to an estimated 5-15% (https://plainscapital.com/blog/the-cost-of-accepting-cash/). In fact merchants can now legally pass through credit card surcharges to customers but very few choose to do so, because they’d prefer you pay by card.