German banks and the art of sending letters

First of all: Yes, I know. Neobank here, neobank there. With Revolut, Trade Republic and Co. I could probably have saved myself this. But I had to vent for a moment. In good r/finanzen style, I occasionally take advantage of new customer bonuses via mydealz & Co. At the beginning of the month I opened a current account with Santander and a deposit with Deutsche Bank (maxblue). The KYC process was surprisingly unproblematic for both - no WebID strangling, no having to photograph me ten times