Complex systems, even when think you designed to avoid complexity, are unpredictable when shit happens. Any system which is hard to completely understand is lik

Complex systems, even when think you designed to avoid complexity, are unpredictable when shit happens. Any system which is hard to completely understand is likely to fail in unforeseen ways, and possibly be difficult to recover from or to know how to change to keep it from happening again. Sadly I see these types of failures all the time where I work, though not quite the same scale. One time a simple DNS update brought down our operations worldwide, even in places thought not to be connected at all.