One totally stupid extra inch of specialty insulation could cut energy by 30%
I had cavities filled with the then most expensive foam on earth and it is better than anything on 2018 models. I tacked Reynolds EXTRA heavy duty aluminum foil to the deck before Erb shot it. Then 5/32" teak.
It's extremely foolish to force people to waste even more energy to try and fulfill demand for heating or cooling.
Even intelligent water draining evacuation has been overlooked. Should take ten minutes to drain every last drop from the fresh water.
Manufacturers are still under the assumption RVs are weekend play toys.