Two places where the the Diesel really shines.
Now this is my experience yours may differ
Carrying a TC while towing a heavy trailer in hill country
it can take the load with ease
Low speeds in high temperatures. A diesel generates very little heat when running slow so you are not going to overheat the engine with the ac on full blast even going up a mountain road
Last fall it was 107* on I5 going up the grapevine towing my horse trailer with two 1200 pound warmbloods, full tack, 25 gallons of water while carrying my lance 1055 with 3 adults on board and we stayed cool and the truck stayed cool all the way over the pass