I am not sure about this (not disagreeing, just not sure). First, 10% of top performers out in 2 years is a normal attrition rate for a 20 year tenure. And I su

I am not sure about this (not disagreeing, just not sure). First, 10% of top performers out in 2 years is a normal attrition rate for a 20 year tenure. And I suspect mean time at the company is much lower. But even more important, I think most top performers understand and accept the risk that their employment may end. For example, the company can fold. It is easier for top engineers to accept that because they likely have better connections and can pretty easily find a good job elsewhere. My 2c.