For DHCP boxes, not an issue. Reboot, bounce the port, ipconfig release and renew, all the same. Get a new IP on the flip side.
For network devices, toooooooooooootally different issue.
:problem?:
And for devices that interoperate with the network and client devices (Why hello there, NAC!), you make one mistake... one mistake... and you got a huge mess on your hands.
:explosion2:
Sticking with the networking stuff, ask yourself, if an IP address of a management appliance changed or if the IP of a core router/switch changed, where would you have to replicate all those changes to?