This is not a new trend, it started back after the recession when the RV manufacturers realized they can save quite a few up front dollars by using a residential fridge. Less installation labor, less materials for the cabinetry as you do not need to build the same type of enclosure, no venting provisions or vents needed, no gas line provisions, and the initial cost of the appliance is cheaper. All they had to do was add in a few feet of extra wiring and the cheapest inverter and battery they could find.
I have yet to see any of them come up with a new idea or design for anything that is not driven by "cheap" on the front end.