Not just old stuff like that either. At least also all the SCO Xenix & Unix'es up to the technically current OSR5, OSR6 and Unixware. I don't know about other (commercial) unixes as much as SCO but given where they all come from I assume Solaris and most of the other commercial unix that still technically exist today have something at least somewhat similar.

The sys admin scripts would even relink just to merely change the ip address of the nic! (I no longer remember the details, but I think I eventually dug under the hood and figured out how you could edit a couple files and merely reboot without actually relinking a new kernel. But if you only followed the normal directions in the manual, you would use scoadmin and it would relink and reboot.) And this is not because SCO sux. Sure they did, but that was actually more or less normal and not part of why they sucked.

Change anything about which drives are connected to which scsi hosts on which scsi ids? fuggeddabouddit. Not only relink and reboot, but also pray and have a bootable floppy and a cheat sheet of boot: parameters ready.