I have never had the opportunity to can dry goods in cans. Certainly, I have bought many things canned like dehydrated food, potato flakes, wheat, pasta, crackers, powdered milk and so forth. Canned items are great for long term storage as long as you store them in a dry cool area off the floor.
Last week a friend of mine invited me to come and watch a group of people canning dry goods. We went to a lovely new finished attached garage on a farm on the outskirts of town. Couples arrived with bags of dry goods that they had purchased from a local restaurant supply store. There were bags of oatmeal, rice and powdered milk.