On one hand this kind of makes sense to me - his experience in the actual auto industry must have seemed invaluable when he was hired in 2015 and people thought

On one hand this kind of makes sense to me - his experience in the actual auto industry must have seemed invaluable when he was hired in 2015 and people thought self driving would be brought to mass market in a couple years. But now that everyone assumes we're in for the long haul (Aurora says 2025 for L4 in some cities), it doesn't make sense for him to want to stay.