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.
I want like a USB c powered whole mouth toothbrush that looks like two u-shaped chainsaws full of tooth bristles that just wiggle back and forth very quickly and spray toothpaste and mouthwash as they go.