Admittedly, this was almost a year ago. I found I could pay with credit cards in Berlin, but once I was in smaller areas I was looked at like I was insane if I tried to pay by anything other than cash. Probably didn’t help that my German was terrible.

In particular, I was staying in Nordhausen for work for a couple weeks. The hotel I stayed at tried to refuse to accept that I paid by card online in advance. Every small restaurant I went to refused to accept either a credit or debit card, and only a couple chain (read:overpriced) restaurants would accept Mastercard. When I tried to buy an Ethernet cable at a general store they refused to accept anything other than cash once they realized I was a foreigner.

Maybe it’s a myth in large population centres, but definitely not overall. I had roughly the same experience throughout most of Thuringia, with even gas stations in certain areas only accepting cash.