Nadella’s shift to a post-Windows Microsoft is the right one; to have done the same a decade sooner would have been better. It also, though, may have been impossible, simply because Windows was still the biggest part of the business, and it’s not clear the markets would have tolerated an explicit shift before it was painfully obvious it was necessary; without a rising stock price, Nadella’s mission would have been much more challenging if not impossible.
from The End of Windows by Ben Thompson