I learned a tip about longevity when in a campground south of Livingston, MT a few years ago. The "teacher" was a retired freight company owner. He referred to his 1T Dodge diesel dually as a pickup, not anywhere near a "real truck" in his experience.
Since he had a 5th wheel camper and didn't need a pickup box for hauling daily stuff, he had bought a chassis cab and added a flatbed to it. A pickup box costs $4000-$6000, so not buying one makes a good down payment on a flatbed.
Chassis cabs are viewed by manufacturers as more likely to get commercial use so they don't have quite the HP and torque numbers of a consumer model. However, they are expected to last almost 3X the use before likely needing an engine overhaul.
Since he had a 5th wheel camper and didn't need a pickup box for hauling daily stuff, he had bought a chassis cab and added a flatbed to it. A pickup box costs $4000-$6000, so not buying one makes a good down payment on a flatbed.
Chassis cabs are viewed by manufacturers as more likely to get commercial use so they don't have quite the HP and torque numbers of a consumer model. However, they are expected to last almost 3X the use before likely needing an engine overhaul.