Plenty of large swathes of the U.S. have plastic cards, e-invoiced bills, and yes, even zero-cost non-drivers ID cards which work across state lines, along with several forms of national ID if one chooses. Hardly anyone writes checks or uses physical mail — a common joke is that you have to buy a pack of 50 envelopes to send 1 letter every few years. Widespread cash is a benefit, not a demerit, as it gives one purchasing power even if out in the countryside with zero internet — indeed the physical dollar is so powerful that I can take it nearly anywhere in the Americas and spend it directly, down to the poorest most remote villages.