Maybe I'm out of touch, but I'd say 200k on an automatic without a rebuild is doing very good. I've got a 2019 F-250 reg cab 4x4, 6.2 gas and it's a great truck, but I don't have enough miles on it to speak to longevity. Last Dodge that I was involved with was my fathers 2010 3500 cab chassis with the 6.7 and 6spd and it was a piece of crap. Tire rod ends shot by 30K, new U-joints at 25K, new clutch at 30K, etc etc. Truck was rated to tow 18K and we never exceeded that, engine was great the rest of the truck was poor quality and didn't hold up. Currently he has a 2016 F-450 cab chassis with only 50K mi, this time the truck is great but the engine is crap. Many trips to the dealer for DPF problems (9 times under warranty), and eventually a turbo failure.
I'm of the mindset now, a man needs a 3/4 ton pickup to run around in and do light hauling/towing, anything more go straight to a class 6-7 truck. The F350-550 or 3500/5500 trucks are way over rated for what they are capable of and too expensive to operate IMO.