Agreed, this makes little sense. As time goes on, someone's ability to maintain a system (assuming it is something that only he could do well when he was there

Agreed, this makes little sense. As time goes on, someone's ability to maintain a system (assuming it is something that only he could do well when he was there) quickly approaches zero the longer that person is not involved with it. What's the realistic limit on this anyway, or when will Blaine no longer be mentioned in relation to twitter? At some point, it's all the current employees' burden to bare.