Yes! I forgot about this. The EU Interchange Fee Regulation (IFR) effectively eliminated the high fixed minimum fees that previously made small-value card transactions unprofitable for merchants.

The net effect of this is that in Poland, for example, you can carry your phone and no wallet, because you can pay literally for everything using your phone. And I do mean everything, I've recently been to a club in Warsaw and the cloakroom had a terminal mounted on the wall, people just tapped their phones.