I do not use chains out of principle. I have a simple rule of thumb, if it's a place where chains were needed to reasonably make a delivery, that is not a delivery I should be attempting, and tomorrow is another day. If the area itself is so bad, that I need chains to get around on the roads everywhere on route. I shut it down, limp the truck back to the building, and punch the fuggout.
With the amount of driveways and properties I enter on my rural route, the usage of the chains dramatically increases my chance for a property damage accident, and it's not a chance I'm willing to take for a package. The only thing I'll go out of my way to deliver, within reason, is medicine, and not just any medication, but the next day or critical care meds, that I know are urgent. All other packages are treated like they're the nonsense, that they usually are, and EC'd for another time and/or place.
Snow days are the best sometimes - no pressure, late start and early quit, EC the chasers, pickups in trace, etc.