You're advocating the retardation of progress for the sake of familiarity, which has never worked for any company at any point in history, and I fail to see why

You're advocating the retardation of progress for the sake of familiarity, which has never worked for any company at any point in history, and I fail to see why Microsoft would willingly fall into that trap. You innovate or you die, and Microsoft is dying. The iPad is killing them. Maybe not quickly and obviously, but it will end Microsoft's dominance in less than a decade.