Everyone's opinion here is absolutely correct. If your TV is also your daily driver with short trips to work, and you do not tow more than few hundred miles, it makes no sense buying the newer diesels. They are costly on the front end, and offer little benefit if you don't utilize a diesel for what it's intended. New diesels do not like to idle or be driven short distances. You WILL have major DPF, EGR issues if you drive them short distances.
Gas motors have gotten much more reliable and durable the last 10 years. In my case, my TV was bought to tow either our 37' TT or the dump trailer hauling loads of materials for the home stead. We tow long distances and at times sit in traffic in 90 plus degree weather with the AC cranked. So in this case if I still owned a gasser, it would be really hard on it to survive towing close to max heavy loads long distances with AC on in high ambient temps. Let alone the heavy right foot. You don't want to blow up a new gas motor. Even though they are much more reliable, they are much more expensive to replace than they used to be. I've owed gasser TVs but traded them out every few years but the depreciation is much steeper that diesels. The wife wanted the big- heavy TT, and carry all their stuff so had to go diesel. Also the market for used diesels is strong. My brother bought an F250 with 6.7, sold it 3 years later and was within 3k of what he paid for it with 30k miles.
East Bound & Down- We Love Camping :)