Out of curiosity: did people really experience empty grocery shelves or are phrases such as "rapidly disappeared" meant more as hyperbole?
I live in a Chicago suburb, and while variety did decrease (I still can't get Coke Zero Cherry) the basics were always in stock throughout the pandemic time.
Why? Because the channel mix changed, and distribution and packaging are channel-specific.
For example, toilet paper is shipped to commercial customers in cardboard boxes, while retail customers by it in plastic-wrapped, branded, and SKU’d blocks of 4, 8, 12, etc. When everyone suddenly stopped going to offices and restaurants, demand plummeted in the commercial channel and soared in the retail channel. It took time for factories and distributors to adjust to that. The same thing happened to a bunch of food staples too.
Since a lot of manufacturing is regional, different areas of the nation and world experienced different impacts.
Toilet paper is interesting because it takes up lots of space, can’t be “compressed”, so most stores doesn’t store too much of them. That’s why they are the first thing to disappear.
I live in a Chicago suburb, and while variety did decrease (I still can't get Coke Zero Cherry) the basics were always in stock throughout the pandemic time.