You couldn't give me a modern diesel truck! No thanks! Injectors that cost $800 a piece and can't be easily replaced, emission system components that can run five figures if there's a complete failure (either user error or soemthing went wrong). With how much power and torque gas engines are making in the 1 ton trucks now, 6/8/10 speed automatic ... I just wouldn't be able to justify one unless I was towing >12K daily. The variable valve timing systems are great in that they can allow a gas engine to have a nice, broad torque curve and , if needed , move the truck aroudn with 4.10 or 4.30 gears and not get single digit mileage empty.
I think people are finally realizing that these newer diesel trucks just aren't worth it unless you are working it at 100% capacity 100% of the time.
"Deleting" is an option, but the EPA has really started to crack down on it. I can make my gas engine work reliably with all of the factory emissions equipment.
I tow a lot, but I don't have the need to pull my Jeep 90MPH up the steepest grade on 81 with black smoke shooting out the back of it and modern pop country blasting full volume; I'm perfectly fine hanging with the 18 wheelers with my 4 ways clicking away and John Prine on the radio.