this isn't new. we had a plastic-only beer store open years ago here. less risk of theft, didn't need daily trips to the bank, etc.
didn't need to find employees capable of making change correctly...
plus cash is dirty. There is a rural gas station in a town we often bike through. Last summer they had a sign up saying 'No cash from bras or socks'. I guess they got tired of rednecks handing them sweaty bills.
^^This. Sometimes even with the newer cash registers that tell the employee how much change to give back, they have trouble counting it out.