Applying theory to another facet of life:

The blades in a typical disposable razor are so thin, sharp, and malleable that they can be resharpened with a typical towel. This got me a lot more for my money until I discovered safety razors. These hold a better edge and can also be resharpened, with leather instead of a towel. I've been shaving for several years on a $15 box of blades I'm not even halfway through.