This a great post that got me thinking about this issue. I think key person risk is heavily dependent on whether its seen if the key person is seen as critically vital for the platform or company. For instance, there is a similar worry for instance if Warren Buffet of Berkshire Hathaway is disabled or passes away. I think whether it becomes an issue or not is dependent on how a company is set up. Companies should have a good plan for corporate succession in case of emergencies with regard to their key people.