Some groceries -- every Whole Foods I've ever shopped at, for example -- have the eggs & dairy at the back with the milk, and stock those shelves from the back, too. Non-dairy "milks" only don't require refrigeration if they're ultra-pasteurized tetrapaks, which (in my experience) are only in 1Lt/Qt containers.
Milk is heavy. It's stocked onto shelves slightly angled forward so the remaining stock slides to the front for ease of reach. This need isn't generally applicable, or desireable, for other refrigerated/frozen foods.
