I know of systems that don't take control of the machine for 30-60 minutes to update themselves (on a regular basis, no less). That's a breakage right there, be

I know of systems that don't take control of the machine for 30-60 minutes to update themselves (on a regular basis, no less). That's a breakage right there, because the machine is not usable. *nix happily updates itself and keeps on running - you only lose control of the box if there's a kernel upgrade that needs a reboot... which is done on your timetable.