“One day a bridge collapsed, and no one came to fix it.”

There is possibly apocryphal story that when the Roman empire collapsed, it retreated slowly. You knew when it was gone from the practical details.

There is a subreddit called “shortages” on that other site, and the top posts right now are chips/ram (predictably) but also medicine, water, food, labor and basic equipment. Makes you wish a toilet paper shortage was your biggest problem.