My young nephew took his girlfriend to Edinburgh for a day out and meal. There was a specific restaurant he wanted to take her to. His heart sank when they were told it's gone cashless. He didn't have enough on his card
I do usually carry a card and use it for some purposes and a backup for unexpected spending. I prefer cash for general, small purchases.
About a year ago I went into a pub that I used to visit occasionally, and had just re-opened after being shut for 18 months. They had installed a pool table, now only accepted cards - and didn't have any ales on. Unsurprisingly I haven't revisited.