>>7
Its not the technical aspect since I've written a bootloader and some protected mode switching crap myself, its the fact that the fruits of your labor will find less users than the most unloved esoteric language out there. Name the next dozen operating systems after winshit, linux, freebsd, and solaris, and figure out how many users they have. The ones with a chance seems to be reverse engineering efforts, and the rest are playing (or really are) crazy.