First BSOD-induced crash has already happened
Now, however, you also have to hope not just the on-board computer not BSingOD, but also that teh intarwebz don't catch acute nonconnectivitis, or that the cloud didn't accidentally discolour, or that your data plan for your car didn't run out, or that.... Ah sod it.
Most of the functions of the car are most useful while inside the car. The rest is just interference by unwelcome busybodies. If I had a car (which I don't) I might be arsed to add a small-ish box to interface with the on-board electronics and have it occasionally check for either the home wlan or a free one, to deliver the weekly status report over encrypted mail, or something to that tune. And no, it wouldn't run any redmondware at all, ever. All the rest is doodads and guffins that nobody actually needs. In fact, most people don't need more than a calendar entry when to deliver the car to the service station for a regular check-up.
So I'm inclined to think of this as yet another "solution" desperately looking for a problem to involve that micros~1-branded clouy thing in, all for grate marketeering. Anybody disagree, please do explain.