One of the major advancements in car safety is electronic braking over hydraulic braking. Now instead of a single brake fluid source going from the master cylinder to each brake caliper, there is a separate control per caliper. Although there is a greater risk of failure to 1 brake caliper, failure is not catastrophic as there are still 3 working calipers. Passengers are also a lot more likely today to survive an accident than 10 years ago.
I don't think manufacturers will separate the drive-train from the technology packages for a simple reason. Remote start. Customers are getting accustomed to turning on their car and setting their temperature controls from their phone before they even get close to their vehicle.
It is possible to secure this with only local area type connections like Blue-tooth/wifi, or with disconnecting these technology features when the vehicle is in gear.