Surely any design should also include plans for periodic inspection, like "pull on each screw and make sure it's not loose or wiggly"? Else you eventually get i

Surely any design should also include plans for periodic inspection, like "pull on each screw and make sure it's not loose or wiggly"? Else you eventually get into situations like doors falling out midflight as happened recently. Diodes can also fail and inspection of their current reliability got to be harder than inspection of screws. If you are working with Soviet levels of quality and service, opting for simpler components might be a better bet.