@nixCraft here is where you are wrong, not in concept but this specific situation. These were Windows problems, I have yet to see a disaster recovery plan that includes having a second set of all Windows devices running everything on an alternative OS. Where choices were made for OS, when they were actually made, was for a reason. In the remainder of the cases the OS was just what shipped on the hardware, and those people are even less likely to make a plan that involves using some other OS.