alt Hacker News> In Europe? Debit cards. Hardly anyone uses a credit card in a supermarket.
Such sweeping statements are impossible for "Europe". It's a big place. Plenty of people use credit cards in supermarkets. But it's orthogonal to the discussion. A creditcard can be contactless or on a phone. Or on a watch.
Of course it is a big place. It is also a big place where credit cards just aren't a thing for most people:
https://n26.com/en-eu/blog/taboo-of-credit
That article lists some reasons why using a credit card doesn't make sense in most European countries. It's not a way to build up your credit score for one. As a Dutchman, the only way I can lower my credit score is by taking on debts (with the exception of a mortgage).
The US is a big place too. I am fairly comfortable in making the sweeping statement that credit cards are a thing used by many people there.