My understanding is that whole grain flour is not very shelf stable, ie. you have to grind it and use it within a few days or starts to taste bad. White flo

My understanding is that whole grain flour is not very shelf stable, ie. you have to grind it and use it within a few days or starts to taste bad. White flour lasts years. A small flour mill is not that expensive, I wonder why more places do not grind their own flour?