Which is sort of the exception that proves the rule though, isn't it? Aviation is outrageously safe, such that all the low hanging fruit has long since been pi

Which is sort of the exception that proves the rule though, isn't it? Aviation is outrageously safe, such that all the low hanging fruit has long since been picked and they're finally cleaning up the uncorrelated failures. Other areas of engineering aren't nearly so advanced, c.f. Fukushima, which happened because of the converse failure: the designers treated two failures (power grid failure and flooded backup generators) as uncorrelated and independent when they weren't (because tsunamis follow earthquakes).