Why are there still businesses in this day and age not accepting card?
Merchant fees used to be prohibitively high, but nowadays, some companies like SumUp charge negligible amounts.
I've often walked into businesses and asked beforehand if they take card, some say "no, but there's an ATM across the street" ... I'm not withdrawing €50 cash (often the minimum amount in some ATMs) just to spend a few Euros on a takeaway or something else. When they suggest the ATM, I just politley tell them that I'll take my custom to a business that operates in 2021 instead of 1921.
Businesses that only accept minimum payment by card also annoy me.