I heard of a story where Walmart did an experiment in one of their stores where they rearranged all of the displays, made the aisles wider, all sorts of things which made the shopping experience more pleasant and less stressful. Customer feedback was almost unanimously positive; people loved shopping at Walmart now, when previously it had been a hostile and Kafkaesque experience.

But they spent less money.

So Walmart put everything back the way it was.