I totally agree. And relevant to the actual topic: Even in big cities like Hamburg or Berlin it is not guaranteed that you can pay by card in a taxi. So I ask

I totally agree. And relevant to the actual topic: Even in big cities like Hamburg or Berlin it is not guaranteed that you can pay by card in a taxi. So I ask every time I enter one whether they accept credit cards or not. I would say 80% of my cab rides are paid in cash.