Indeed. When I was living near one, I could walk in, fill my own backpack with stuff, pay in a few seconds and walk out. Another advantage is that I could see that discounts had processed properly, instead of having to check the receipt.

But once I moved away, I started using home delivery and it's even better. My shopping now consists of ~15mins browsing a website, and ~15mins receiving and unpacking bags, and I only need to do it about once a fortnight.