Are you kidding me? Launchd helps coordinate a massive selection of on-demand GUI-related services and their prerequisites. (254 services on my Mavericks install as of writing)
SysV init is ill-suited to that sort of complex event-oriented management, which (for example) is exactly why Canonical developed Upstart in the first place.
SysV init is ill-suited to that sort of complex event-oriented management, which (for example) is exactly why Canonical developed Upstart in the first place.