...as long as the supermarket did not slip.

"Some of the houses in town were showing signs of neglect. The park benches needed repair, the broken streets needed resurfacing. Signs of the times. But the supermarket did not change, except for the better. It was well-stocked, musical and bright. This was the key, it seemed to us. Everything was fine, would continue to be fine, would eventually get even better as long as the supermarket did not slip."

Don DeLillo, White Noise (1984)