I own a bar and restaurant and while we don't use Sysco, we totally would for some items. You know, frying oil, canned soda. Maybe glassware, knives. Toilet paper, napkins, baskets, ladles, ticket books. Flour, sugar, salt, pepper. Bleach, oven cleaner, simple green, sponges, bar towels.
I'm just getting started, and none of that is really food. We drive ourselves to buy meat and produce.
Getting all that shit into the building is a full time job. It's nice to outsource (some) of it to a truck.
We're lucky to have a local old school warehouse literally next door. They have computers that run dos on green monochrome screens and print on that wide, green-lined paper from the 80s. We use them instead of a truck, but the concept is identical.