I do a lot of DD, and I’d bet that 75%+ of my restaurant orders are a single order going to a single house. I prefer grocery delivery, and it’s probably closer to 50% for those, as we often get a couple of orders at once.

Occasionally we get a single drop off with 2 stops (pick up food from a restaurant and something from a drug or grocery store, and drop them both off together).

I’ve never gotten more than 3 orders at once, and those are pretty rare.

In my area, I’m going to have to drive 15 minutes one way to the nearest place to pick anything up, so it’s not much different than having it delivered. We have never gotten delivery out here, since no one delivers but the third party ones (DD/UE), but someone delivering out here could possibly waste less fuel than I would to pick it up if they end up bring multiple orders out here.