For me, it’s an electric toothbrush. It doesn’t matter if you go with Sonicare or Oral-B, once you start using an electric toothbrush, regular toothbrushes don’t ever feel like they clean your teeth properly. The smooth plaque-free top layer of your teeth that you can feel after using an electric toothbrush can’t be replicated with a regular toothbrush.
You should take a look at Suri. I had the same annoyance and objection fo oral b and philips and their lazy lack of any form of effort to improve or innovate or be environmentally responsible. Been very happy with a suri for a couple years now, I send heads back for recycling and the battery lasts months at a time. https://www.trysuri.com/