Like I said, a decentralized system can fail, but the root cause of such a failure cannot be "configuration change". If a configuration change is sufficient to

Like I said, a decentralized system can fail, but the root cause of such a failure cannot be "configuration change". If a configuration change is sufficient to break your system then it's not truly decentralized. Let's take your car example. If you update your car's firmware and get in an accident, it's not a system-level failure. If manufacturer sends a wireless update and all their autonomous cars start to bump into one another, it's not really a decentralized system anymore - updates are centralized. If you update your car, it crashes, sends a wireless signal that affects another car, and it crashes and so on... This is an example of a cascading failure in a fully decentralized system, but the real root cause would be cars interfering with one another, not your firmware update.