The expensive ones might do annoying things like beep to tell you it’s been two minutes of brushing.
Sure, they have all sorts of unnecessary features.
If they don’t take the same type of head
Indeed they do not.
The cheap one might be a better shape or weight.
Substantially so. The cheap brush I’ve got both has a better-shaped head and bristle layout than most fancy ones, and a much more ergonomically favorable body shape.
The expensive ones might be more complicated in ways that make them likely to break sooner.
Yep, for sure. The toothbrush I had lasted me for about 10 years. The fancy ones won’t.
They might have different charging methods, and you prefer to method for the cheap one.
Or the cheap one has better battery life.
A single AA battery, lasting for weeks. The fancy ones generally have rechargeable internal (non-user-serviceable) batteries with a proprietary charger—so when the battery stops holding a charge, you’re out of luck and must replace the whole thing.
(ETA: Note that the toothbrush being rechargeable means that I now must devote space in the bathroom to the charger—including the hassle of arranging for it to plug into an AC outlet—or else have to have the brush sitting in another room of the house, instead of conveniently located in the bathroom. With the AA-powered toothbrush I’ve got, it just sits near my sink, like any normal toothbrush.)
The expensive ones might have Bluetooth, which you might disprefer even apart from its effects on e.g. battery life.
Yep, this comes under the “unnecessary features” heading.
The bottom line is that the more expensive toothbrushes have, quite literally, no advantages over the cheap one (given my needs), and many disadvantages. Switching to a more expensive model would be a strict downgrade, a choice that is unambiguously dominated by sticking with the cheap one.
Sure, they have all sorts of unnecessary features.
Indeed they do not.
Substantially so. The cheap brush I’ve got both has a better-shaped head and bristle layout than most fancy ones, and a much more ergonomically favorable body shape.
Yep, for sure. The toothbrush I had lasted me for about 10 years. The fancy ones won’t.
A single AA battery, lasting for weeks. The fancy ones generally have rechargeable internal (non-user-serviceable) batteries with a proprietary charger—so when the battery stops holding a charge, you’re out of luck and must replace the whole thing.
(ETA: Note that the toothbrush being rechargeable means that I now must devote space in the bathroom to the charger—including the hassle of arranging for it to plug into an AC outlet—or else have to have the brush sitting in another room of the house, instead of conveniently located in the bathroom. With the AA-powered toothbrush I’ve got, it just sits near my sink, like any normal toothbrush.)
Yep, this comes under the “unnecessary features” heading.
The bottom line is that the more expensive toothbrushes have, quite literally, no advantages over the cheap one (given my needs), and many disadvantages. Switching to a more expensive model would be a strict downgrade, a choice that is unambiguously dominated by sticking with the cheap one.