[jinfiesto]

With regard to number 1, I've found that some places that do grocery delivery in house (like Raley's,) apparently keep separate stock for delivery (discovered by asking) and it's often in better shape than what's on the floor. I think this is because there's some sort of 100% satisfaction policy to incentivize adoption. This has borne out in my practical experience as I've almost always been more than pleased with the produce delivered by in-house grocery delivery services. The only thing I don't love is that the online interface isn't always synced accurately with what's in stock, so often I get calls having to hash out substitutions before they can deliver.

WRT alcohol, I personally usually shop for that stuff at a specialty store like Ben's or Total Wine. I realize other people have different shopping habits, but I would have to make a special trip for groceries separate from my alcohol trip, and I appreciate that delivery helps me save a trip.