Just as worrisome is the hydraulics: there have been many total hydraulic loss incidents. The aviation industry tell you about their 3 or 4 'redundant' hydraulic systems
Japan Airlines flight 123 by failure or pressurization bulkhead bear tail apu. United Airlines Flight 232 by engine disintegration DHL/EAT A300 With No Hydraulics After Being Hit By Missile.
Basically the 'triplicated' hydraulic systems all route next to each other. Should a traumatic event damage all three then they all bleed out. At least with electrical systems circuit breakers disconnect the faulty system. In hydraulics once the fluid is gone then that's it.