Another interesting question: what does it to to youth? If you grow up with the idea of "money" as a stack of coins and notes that disappear as they're consume

Another interesting question: what does it to to youth? If you grow up with the idea of "money" as a stack of coins and notes that disappear as they're consumed, does it create a different perspective on spending and saving than seeing it primarily as a score on a screen? I can recall a bit of a parenting crisis back in the '80s, where there was concern that children wouldn't learn to read an analog clock face; there's probably some knock-on factors about understanding fractions and modulo arithmetic. I'd expect similar needs for physical money; change making is fast mental math.