The title is a bit of an exaggeration.

Why do corporations change shampoo and toothbrushes so often? I’ll go through 10 different shampoos and toothbrushes, then find ones I like. I’ll probably be able to purchase them again a few times before the ones I like are no longer available.

What are the forces driving manufacturer’s to change their basic wares so often? Besides Wall St. greed, that is?