I have seen a doc about Home Depot (not the pictured store) some time ago. Apparently the overstocked facade was a big deal because those big stores want you to think they have everything that can possibly exist in their inventory so you only always go there and make no further stops.

Of course, it's smoke and mirror and a lot of stores adopted the big warehouse style for the same reasons. Some stores have legit empty boxes filled with crap all over. If you ever went into one of those store looking for something very specific tho, it is pretty apparent that they only overstock a few profitable items and the rest is no better, or worse than smaller locally-owned shops inventory-wise. Only exception around here would be Costco, which is a.legit warehouse.