My take is this: if I decide that I want built in cabinets using 80/20 then I will go with the single bed rug and save some money. As the cabinets are going to be concealing most of the walls of the bed. The insulation and sealing factor would be nice, but I don’t find much dust now that the tailgate is sealed and I will eventually have a heater solution (espar, webasto, etc) which eliminate the need for insulation. On the topic of insulation, I heard a guy say why not save the money that would be spent on a full bed rug and put towards a heater which is the ultimate solution and this made perfect sense to me.