Mr. McKinnon, you sound smarter than me, but I'll say this: Electrified vehicles, especially, are becoming 400- and 800-volt platforms that can platform all kinds of applied technology. The vehicles themselves have more code in them than commercial airliners.
It is the latest and the best technology, including encryption technology, that goes out in vehicles these days. It's just that they get sold. Once they're sold, unless the vehicles are connected over the airwaves with permission from the customer, it's not difficult to see how a two-year-old vehicle or an eight-year-old vehicle might be an easier mark for criminals.