True, there will always be a need for immediacy in shopping. However, on three of the four you listed (Not sure if I want to know why you need ammunition at 1 am...) Amazon carries them, and at a reasonable to very low price. Most of the time I know I'll need something a couple days before. Instead of "I'm out of coffee, better go to the store" it's "I'm running low on coffee, better order some and it will be here in two days". Personally, I find that to be more convenient most of the time.