I'm in Denmark, I believe this is pretty much the best example of the kind of country you are talking about, unfortunately I have some personal problems along various spectrums that mean I am not good at keeping track of things that I cannot control through a computer, anyway Denmark went nearly cashless for a bit and because of my personal problems I did not have a credit card for a portion of that time.

A cashless society would mean a society where some neuro-atypical people might periodically have to worry about starving to death.