I can't help but think that there are other factors besides a single individual regarding Zune, Vista, CE, and so on. Can it really be true that one individual is responsible for every one of those going the wrong way?
Microsoft is still a valuable company and continues to be in millions of homes, businesses and schools around the world. Keeping a foothold in that market seems like a success, to me. Losing stock value is one aspect of the measurement of successes of a company, but is it truly the reflection of a single individual?