Not a recommended procedure, as the Enterprise used to say. SunOS
panics if init dies, but there's really no reason why it should.
Without init you won't get any new getties, and orphaned processes that
terminate may become perpetual zombies, but the system basically
works. Init, of course, shouldn't allow itself to terminate in the
first place, and to help it stay alive the kernel lets it block
SIGKILL.
-zefram