Well like FB, these guys either learn they're not the "right" person to be the CEO and bring someone else in with the proper experience, or they wilt away like a plant starving for water.....slowly, oh so slowly, but surely til dust.....
Sometimes I think these guys are so uber smart, almost too smart to see this and need somebody close to them to smack them over the head and tell them! Like Rocket scientists, nuclear engineers....some of these guys soooo sooo smart, but socially inept.
Step aside and do what you do best, focus on that......let a captain be a captain and steer the ship, you go be a geeker....and still own the boat.