We had ceramic stand offs in our high voltage circuits in the radars I worked on in the Navy.
There was this one failure on a radar that was 40 years old where the ceramic had a hairline crack that eventually developed a rust line from the screw in the center of one side through to the screw in the center of the other side. Took us five straight days to find it because it just was not something you think of looking for.
Sometimes a pinched wire's insulation will be fine for tens of years and then one day it just gets old enough that it starts to arc over and then sometimes a transistor just quits working the way it should and starts shorting out.
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The Zombie Apocalypse is Upon Us.
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