Why not put that thing into the car? It would take both space and weight (i.e impact range and performance) but then we could install outlets anywhere. The car

Why not put that thing into the car? It would take both space and weight (i.e impact range and performance) but then we could install outlets anywhere. The car (fleet) owner would be responsible for everything, including maintenance and replacements. Maybe there's a reason why cables are part of the appliances instead of the outlets? Also, car owners would certainly prefer a snake that works everywhere and not just at home.