Those racks are a waste of space, imo but what do I know. To each his own. A no cost and no wasted space solution is to designate two areas be it two shelves or two cabinets or two whatevers. Area 1 is for current use and older dated items and Area 2 is for later use. Add new purchases to Area 1 when it starts getting low but remember not to use new stuff now. When the original older dated items in Area 1 are used up switch your current use to the Area 2 stash. Finish restocking 1. Rinse and repeat. It sure beats having to rotate every few months.
You don’t know much. I was able to more than double what my pantry space holds when I went to the horizontal racks. Most flat-shelf pantries are >50% empty space to allow you to reach into the back. Storing cans horizontally means you can more than double what a shelf can hold and food rotation is automatic.