Flaps would not have any assymetry protection or flap indication. Had electrical smoke in the 757 one day both in cabin and cockpit a couple years after the Swissair crash near Halifax. Downloaded a couple of busses, declared an emergency and landed still smelling smoke. I had previously thought through what electrical I really needed and VMC you don't need anything, not even the battery to fly and land. You could momentarily power up electrical to check gear, flaps and communicate if you wanted but you don't have to keep power on if something is burning.