I remember reading an article many years ago about product management being like being a parent, and there being a latter point where you need to let the product go and admit it's done. Windows is clearly there, and Microsoft are doing a terrible job of it. Yes, it's less relevant than it's ever been, but it's still vastly widely deployed, earns money, and delivers other cash cows (like Office) - all they have to do is do the basic stuff to keep it going and not mess it up, but somehow that is not what's happening. Wild.