What may matter more are issues where a fixed address is more useful, like binding specific ports for two-way access through a firewall. In my home network, for instance, I have a Netgear router with a built-in firewall. For some applications I need to set up port forwarding, and the way the router works, a given port or range of ports can only be forwarded to one computer at a time. To make sure that the same sets of ports are forwarded to the same computer, I have the IP address on my computer hard-assigned to 192.168.0.2 (192.168.0.1 is the firewall itself). Other devices are set to use DHCP and obtain addresses as needed, since they don't need to have ports bound to them.
This was first published in November 2004