User feedback
The project team I used to work on had a saying to the effect that, when you ask for feedback, the number of possible answers you get increases as the square of the number of people you ask. M$ have probably been asked by now to incorporate more "features" than there are stars in the universe. No wonder they are in a mess.
The hole they have dug is now much too deep to climb out of. Short of putting together a SMALL decision making team and designing a brand new, coherent OS from the ground up.......