The principle of bulk shopping is a good one, and it's on that principle that companies like Costco have thrived for years. Buying multiples of an item is cheaper than buying small quantities of the same item, and so it makes sense to stock up. Costco, and businesses like it, invite people to order a whole month's worth of shopping (or even more) in one go, and have it delivered. What could go wrong?
The Washington Post has chimed in on this, and they've identified two threats to the current bulk shopping model. The first is that ordering direct from a supermarket or store for a weekly shop and having it delivered is no longer much more expensive than visiting a warehouse. The second is that millennials - who, as we keep being reminded - don't buy houses for years - don't have much storage space. It doesn't matter how cheap your goods are if you have nowhere to put them.