When I lived with a former Airbus engineer, he explained that these systems were running 80486 processors due to their relability (in the sense that nothing une

When I lived with a former Airbus engineer, he explained that these systems were running 80486 processors due to their relability (in the sense that nothing unexplainable would ever happen). That being said, he also told stories of how the complexity caused software bugs to manifest themselves that often disappeared before their causes were determined.