[Veserv]

To elaborate on the parent's point, you should not be running automatic updates because you should be running manually verified and rigorously tested updates before you push a change in a safety-critical component. This is because an update to every device containing that component introduces a correlated failure mode. If the change is bad, you risk harming or killing everybody at the same time. This is in contrast to standard hardware failures modes which are much more likely to be uncorrelated, so the chance of harming everybody at the same time is (1 / FailureRate) ^ N. If a safety-critical system requires updates and can not verified and tested in context before being deployed it is criminally irresponsible to deploy such a system. Both automatic and no updates are similarly inadequate in much the same way that even though cardboard is stronger than tissue paper, neither is an adequate bridge building material for a car-carrying bridge.

tl;dr Both no updates and automatic updates are criminally irresponsible. If you can not verify and test updates in context for an appropriate amount of time to verify safety stop before you kill somebody.