An interesting suggestion, but I feel I must point out that you are overlooking the ‘driver’ problem. If the machine is fairly new, the manufacturers most assuredly did not bother to include any drivers for XP so it will have a hard time properly displaying on the monitor, not to mention the system bridge chips which control things like internal drives, sound, and networking to name just a few. Then there is the USB 3.0 standard which was not around when XP was first released. Add in SSDs and flash drives and one can only imagine some of the difficulties that would be encountered. :(
Come on. When XP is used in a virtualized fashion then windows 7-8-10 takes care of the rest. XP is treated like just another piece of software within windows 7-8-10