Problem there is that the systems aren't always accurate. I've been in the store looking at things like we're talking about. Gizmo sez they ain't got none. But I can look at the shelf and grab the item in my mucky mauler. Call a clerk over, show them my screen, show them the item on the shelf. They look, compare stock and SKU numbers. They check their instore device connected to the in store system. Sez they ain't got none even though that have one in their hand and there are six more on the shelf.
They groan, shrug ... 'oh another one of those' ....
I did that with wasp spray one day. Showed the customer service rep a stack of cases of it ... 10 feet in front of where she was standing at the customer service desk compter that said they ain't got none.
Also, several things are now buy in store only, no web orders ... things like bags of concrete. No one can explain that one to me.