Well, space is one. I live in a 43’ 5th wheel so space is really limited. I have several cabinets that aren’t in use which is where I’m going to store the stuff I just bought.
I also have a pantry but again, it’s limited. I have to buy what I know I can put away.
Mormons stock many of their goods/supplies under the bed in lieu of a box spring. On closet floors/shelfs.
Had neighbors that had barrels of various grains in their lower quads levels. They conducted classes on prep work.