Ask HN: Lost Sub Titan, Fail-Safes and Rescue SPoFs

in software performance & scalability there is typically one thing that is the bottleneck

in an electro-mechanical system (at least where life is on the line) engineers try to design to avoid having any single-point-of-failure (SPoF), and to make it "fail safe" if power is lost

the Titan drama has made me think that a sub design should put a higher priority on oxygen supply (and life support in general) inside it. however small/civilian the model. because TIME to rescue is your biggest friend and enemy

thoughts?