Wait… Are you people doing a “brushing” action back and forth with your electric toothbrushes?
I just move it across each surface once in a slow kinda up and down zig zag — the way you would use an electric buffer or power washer to clean a long narrow surface with multiple sides… Upper set of teeth first; front, left side of mouth to right side of mouth. Repeat for top and back surfaces of teeth. Then repeat it all again for lower set of teeth.
I guess the front of teeth could be combined into one surface, but I’m a raging psychopath.