Why in the world does your toothbrush need to be online? It's a piece of plastic with bristles at one end. The electric ones that live on their chargers really don't need to send you a notification when they are recharged, do they? Or do you need a model that reports to your dentist how often you brush, for how long (on each tooth, right?), with how much pressure (on each tooth, again, because why not???).
Yeah, a brush that tells you that you are pressing too hard (or soft) with some kind of audible notice would be reasonable, or that tells you when you've been on an area long enough, but can anyone really justify why it has to be online to do this?
Just because you can doesn't mean you should.