Don't get the wrong idea. My driveway isn't a truck dealership.
I've been blessed and am able to provide a truck or two for folks that I enjoy sharing with. (My dad is 85. He loved the BIG WHITE numbers on the speedometer of my F150. I handed him the keys. Went and got me another. That sort of thing)
I agree that todays gas driven drivetrains are a MARVEL compared to yesteryear. But we are all "haulers" here. So as I stated earlier, the old debate between gas\diesel used to be clearly a debate between light-duty and heavy-duty trucks. But these days that distinction is blurred since we have light trucks with diesel and heavy trucks with gas!
I personally think the new entrant to RV-towing has a more complicated learning curve because of this possible confusion.
Towing capacity figures are so misunderstood by the rookie. I know. I was a rookie. But now I get it. For me it is a lot less about what's under the hood, and more about what is under the chassis. (Suspension, axles, brakes, hitch)
Almost everyone tows heavier than I will. I tow LIGHT for whatever truck I'm in.
It's so comfortable. I don't camp 200 miles away. I camp in 10 different states when I run away from home.