Bruce Chizen’s move to hand over the reigns to Shantanu Narayen is more of a personal decision than due to any financial or business reasons.
However, there have been indications in recent public appearances by Chizen that he was wearying of his post.
Chizen called dealing with the financial community “going to the dentist without Novocaine” and said the transparency of his life as CEO is “weird” and “awkward” because “everybody knows how much money I make and everybody thinks it’s too much.” Link.