No idea where you people live in Germany but I haven‘t used cash since Covid lockdown. Like I legit run around with not a single Euro in my pocket, it‘s all Apple Pay (Girocard, Mastercard and American Express).
The only issues I have is with AmEx acceptance, literally every shop I bought something at accepted at the very least Mastercard or Girocard. Even small bakeries, the dingiest car parking lot and literally every single Kebab shop I ever tried.