There's been plenty. Dentists, dental hygienists, it's been almost 4 decades and no-one has recommended it, so I don't think it's that. They have, however, shown me how I should use a normal, manual toothbrush most effectively, and I've followed that advice to success. Haven't had a cavity since my first cavity as a teenager, it's been over 20 years since then.

Are y'all based in America? I bet dentists there are paid to endorse the electric toothbrush industry there. But maybe not.

Maybe there are scientific studies that show that electric toothbrushes are objectively better for dental and oral health? If so, I'd love to see them and maybe I'll consider getting one.

For now, I'm just sick of having yet another thing that has a damn battery that needs to be charged god-damnit.

I was not able to find anything properly proving that proper tooth brushing cannot be achieved with a normal toothbrush. Dentists usually should tell you if you are brushing too hard or missing spots. If you follow this advice, the same amount of cleaning can be achieved without spending as much as you need to for an electric toothbrush.

And for the issue of brushing too short or too long. A toothbrush telling you is not better than just setting a timer but way more expensive...