If that's the case... You could send any machine with FreeDOS installed and really blow their mind, or at least I would think so? I'm not sure how well maintained FreeDOS is for more modern hardware. I assume it would still install and run.

The primary issue is that even with FreeDOS, if you're not using 8bit ISA, PC BIOS or compatible, and if your CPU is too fast, it wouldn't meet the standard of running PC DOS applications in any usable sense.