I'm not a fan of cash, mainly because the more bills and change I have to keep up with, the higher the possibility those bills and change will not stay in my possession. I'm notorious for losing cash. Somehow I've managed to keep my debit card in my possession and in the event I did lose it (which would probably happen in my own home) at least I can cancel it and wait for a new one. Lost cash is lost cash.
I worked as a cashier for a food place for a bit and we got half and half on cash and credit transaction. I think this might be due to the fact that a lot of other places in the city are cash only or have a minimum on debit/credit transactions, but I thought it was surprising how many people carried physical money.
On another note, I saw someone use a payphone the other day and it occurred to me that I may have been looking at one of the last payphones in existence.