Personally, I've never worried much about the electronics in newer cars. All but a handful of vehicles that I've owned, have had some form of electronics in them. I even have an OBD II code reader at home, so that I can self diagnose problems, if they do ever pop up. Thus far, I've had only one sensor ever fail, and that one was the ABS/speed sensor in the truck. It took me longer to crawl under it, than swap the part. As with any other high dollar component in a car, you don't want the one of the CPU's to fail, and you shudder when they do. The reality though, is that these failures are very uncommon.