Just because they say you can tow 11K, doesn't mean the truck won't struggle, I feel every bit of the 5K lb Pontoon on my truck, but I came from 2 each 2500's and 2ea 3500's before my 1500. My first 2500 was the 360 Magnum gasser, and though it towed well, but it ran high RPM's on 6% grades. The CTD's never flinched at what I owned and towed. I went to a 1500, because I no longer needed a truck for 22K GCW with the 5ver being sold. Besides the fuel filter, frequent trans service and high oil change costs was reason enough to get rid of the 2019 3500. I never did my own oil change because the dealer costs were reasonable, compared to the retail oil costs. My 1500 with the 3:21 diff feels every pound of the Pontoon at 5K lbs. If I were to tow the max weight that my Ram says it can tow, I'd have to have a weight distribution hitch setup for safety.
HSKR R/T you can laugh all you want, be my guest.