New trucks of all makes are rotting like crazy. My 05 needs rear wheel arches and cab corners. The bottoms of the doors have surface rust due to peeling paint but it's not rotten yet. I'll have to wire wheel it off, neutralize it and paint them in order for them not to explode. In a couple of years I'll fix the box and do cab corners, probably need rockers by that point as well lol. I could get a newer truck I guess but they don't seem any better, plus I use my truck as a truck so I'd feel bad pulling stumps around with a chain and banging it up.
Ford and Chevy suffer the same problems, every 2011 ish Chevy/Ford I see here has cab corners that are full of cancer, it's not just a dodge thing. Actually the 4th gens seem to be holding up better than the Fords and Chevs. I talked to a body guy and he says that they now put foam in a lot of areas in the cab for NVH reasons and they hold moisture and rot.