There is a shift by many from the older definition of camping to just driving your rig from FHU CG to the next FHU CG. Hence propane no longer needed. Instead more batteries and larger gen for the very limited amount of time they will actually dry camp. It helps that newer residential refers use much smaller amounts of AC power. So this group of "campers" sit in the rig watching TV with the ACs (as in 2-3) running etc. Just run the gen as required.
All electric simply means no propane so alternate energy is used for the refer, stove top, oven, furnace and hot water.