[throwaway29303]

I agree.

  Why does my toothbrush have to connect to bluetooth?

  Why does my refrigerator twitter?

Analytics etc; to get "relevant" ads. That's all this IoT and data syphoning etc is mostly about.

How often do you brush your teeth? What toothpaste do you use? Maybe your dentist needs to know that or, at least, someone from some (big) (tech) company doing data science about it for whatever reason (mostly to show you ads).

Knowledge is power.

[AnimalMuppet]

Sure. That's what's in it for some "them" out there somewhere. What's in it for me, the consumer who just wants to brush my teeth?

(Crickets.)

So don't hold your breath for this stuff to take off. Most people won't spend more money to buy something that will benefit someone else.

[CRConrad]

That's why they build it into everything, so you won't have a choice but to buy it.

[AnimalMuppet]

Dollars. Somebody's going to follow the dollars. If it costs less to build a toothbrush without bluetooth (and it absolutely does), and if the most of public doesn't care enough about bluetooth to pay more for a toothbrush, then the one who makes bluetooth-less toothbrushes will make more money. Somebody will do that.