I still remember last time I visited. One Sunday morning, I went to the Bäckerei and tried to pay for my Brötchen and Stückchen with my card and they just looked at me in disbelief. I quickly realized my mistake but it was too late. I had no cash so I left without any baked goods.
Recently I was with a German friend and she nearly fell on her ass when I showed her that you can actually pay at a car parking machine in the middle of nowhere with Apple Pay here in the UK.