On the ‘net: Privacy and IPv6 Renumbering
One of the biggest advantages of IPv6, from a network administration perspective, is the ease of renumbering. While IPv4 networks can be renumbered using DHCP, the process of changing the address of every device on a network is always fraught with unexpected challenges. People (like me) have a habit of manually assigning printers and network attached storage devices a fixed address so they will be easy to find and use.