Re: I despair
To be fair, this isn't the first connected toothbrush. I've had an Oral-B with Bluetooth for years which allows custom brushing plans and connects to a phone to get various data in/out and to your dentist. Never had firmware or compatibility issues and it works stand alone so that wouldn't be an issue anyway.
It hasn't really offered any value over a non-connected toothbrush though. I only got it because it was bundled with 3 years worth of heads, making it cheaper than the cheap version in a TCO comparison.
Now that I've written that down I'm more concerned with the fact that a TCO is necessary for such an item these days than I am with RoTM or plastic waste...