In many US states, there is not even a meaningful safety inspection. In some there is no inspection required at all. People won't intentionally make their vehi

In many US states, there is not even a meaningful safety inspection. In some there is no inspection required at all. People won't intentionally make their vehicles dangerous, but it's easier to make bad software than to completely bodge a physical repair using manufactured parts. I don't know how vehicle software works, but hopefully they don't crash like consumer software. Someone here knows the answer -- is there like a supervisory manager/kernel that keeps all the subsystems running? And modular separation so that bad changes to the fuel injection system won't take out the fly-by-wire brakes?