That made me chuckle. The same people that would accept cashless are the ones pushing the "climate change" thing, and if there is one thing for sure, when the transmission infrastructure gets flooded or burnt it's not going to work very well.
So, lets imagine that you wake up one morning and the phone doesn't work, or it got stolen or something, how are you going to pay for your public transport to work, or buy lunch or a beer after work?