So Cutts left, and now Amit is gone. Why are all of the original people involved with search leaving? Is it just that search has greatly improved and there are only marginal improvements, or is it because the objective has evolved from providing users the best search results to providing the search results with the highest earnings per pageview?
Or it's that they're are past the middle of their working life, and they feel like exploring what else life has to offer.
You meant Matt Cutts? He's still at Google, isn't he?
because the original people involved with search have by definition been in the same job for the last 15 years! why is "they feel like doing something else now" not a good and satisfying enough explanation for their leaving?