@WPF Developer: No, Centennial will not work on anything other than desktop. If you want to run on those platforms, you need to become a UWA. Centennial is a great way to start the port to becoming a UWA.
@Question: We won't. This isn't just a question of creating an exception. Servicing components like drivers actually requires different technology. For example, drivers often can't be serviced without a reboot, because they can't successfully be stopped. We have other technology for servicing drivers.