I think most people are still under the misapprehension that the shops close for the best part of a week and that if Christmas isn't absolutely, 100% perfect (materially, at least) down to literally the last mince pie.
We did our shop yesterday down at the local Aldi, then nipped round to Bargain Booze for the alcoholic stuff. Realised this morning we'd forgotten the pork pie, but the corner shop Co-Op had some in, so that's that sorted.
No fuss, no supermarket stress, no trying to please everyone else and no pigging out until we make ourselves ill. Sounds good to me.