So here's a thing that feels like perhaps it bothers me disproportionately, but I'm curious to know how other people experience it.

After dining in at a commercial eating establishment, I go to pay the bill. Once in a while (usually at a middle-to-higher-end eatery - never a basic cafe or burger joint/pub/etc), the person taking payment - almost always the person who actually delivered our meals, poured the wine, etc - will enter the cost of the meal, then proffer the electronic payment device – not ready to accept payment, but displaying a screen with buttons to add a tip (usually a few buttons with various pre-calculated percentages). In order to pay, I first either have to choose one of the suggested tip rates, or the button that says “no tip”. Only then am I able to tap my card and pay.

To Americans, I’m sure this seems entirely normal - it is the done thing to tip at the end of the meal (somewhere in the range of 15-20% of the value of the meal, provided the service received was decent): either you leave cash on the table, or you do it by writing the tip amount onto the credit card receipt before signing it. I expect now it’s done with buttons on a screen like I’ve described.