The Linux kernel is really, really large, and changes extremely rapidly, to the point of breaking such "experiments" (as the original poster already noted.) It'

The Linux kernel is really, really large, and changes extremely rapidly, to the point of breaking such "experiments" (as the original poster already noted.) It's also rather loosely commented and, aside from a handful of core systems, not so well documented. The BSDs do much better here; they have excellent manpages for almost all kernel APIs, manuals for how the internals work, and very good source code commenting and organization practices. Haiku is not as good as the BSDs on manpages and manuals, but that's the only real way we differ from them (in this respect.)