I understand the value of freshly ground pepper, nutmeg, or any spice where the essential oils dissipate over time. But what is the purpose of grinding salt? It's a mineral that should not change with time provided it is stored in a low humidity environment, so I can't imagine that it for a fresh taste. I keep 4 different siza and style of salt crystals: kosher, coarse grain sea salt, rock salt and some Morton's iodized lurking somewhere, so I think I've got most bases covered. Opinions?