Yes it isn't so much cash vs card. It is just that with a card it is very easy to fall into the "I'm in a rush just grab what you know" trap. You get to the che

Yes it isn't so much cash vs card. It is just that with a card it is very easy to fall into the "I'm in a rush just grab what you know" trap. You get to the check out, you rush to pack the bag and just tap your card against the reader and leave. I didn't even check the amount as I didn't need to enter a PIN thanks to contactless. So cash forced me to pay attention. There is no reason you can't do that with a card, I just needed the cash method to force me out of my bad habits.