It's a great OS to play around with, after all. I know a guy that uses TempleOS to poke around his hypervisor's private internal data that's not exposed in the normal control interface because it's the one of the only "full" OS'es that allows unrestricted access to protected memory and lets you write programs and stuff in it in a relatively familiar language (HolyC).
I learned lower level programming through HolyC. I never know what to say when someone else wants to go from high to low as well, as people don't take my TempleOS suggestion too seriously ;)