Germany really doesn't believe the last 60 years
It's true, but it is slowly changing.
The prime example I have is that I have been living in the Three Border zone, the area where Luxembourg, France and Germany come together (Schengen is the spotlight, yes the Schengen Treaty was signed there).
In my area, it is quite common to go shopping in all three countries in a single day. Today.
But ten years ago, while the French and Luxembourg shops all accepted Visa and Mastercard, German shops held steadfastly on to cash only. Result ? Not so many border shoppers, because cash is a nuisance when you are not planning on just buying one thing and you know its price range.
Consequence ? German shopkeepers realized, somehow, that staying on cash only was preventing impulse buying, because you can have no impulse when you only brought a fixed amount of cash.
It's been around five to eight years that German shops in my area have almost all adopted credit card payments. Now, if you go shopping in Perl, you see Luxemburgers and French. Go to French shops and you see Luxemburgers and Germans, etc. It's all a game of merry-go-round, but it seems everyone is happy about it.
But it still took the German shops until past Y2K to finally cave in to the credit card.
There's another story on this subject. It is said that, when crafting the Eurozone bills, Germany wanted a national side and a Euro side. That idea was refused and, it is said, it's a good thing because otherwise, German shops would only have accepted German-side Euro bills.
I don't how much of that is true, though, but it's always good for a chuckle.