Against optimization - The idea that you need slack in the system intuitively makes sense, but it feels hard to prove ahead of time. The powers that be have to believe that things will go wrong, but they’re usually so focused on things going right (sometimes hubris, sometimes too much trust-by-ignorance) and pre-optimize. // “A truly optimized, and thus efficient, system is only possible with near-perfect knowledge about the system, together with the ability to observe and implement a response. For a system to be reliable, on the other hand, there have to be some unused resources to draw on when the unexpected happens, which, well, happens predictably."