Glen Kent wrote:
While in some environments, typically with small number of devices, its indispensable. Small businesses may not want the complexity of setting up a central server (for DHCP) - SLAAC works very well in such environments.
IPv6 routers are the central servers for SLAAC with the complexity of setting up. Moreover, SLAAC is stateful in the worst way, because states of address assignments are held unnecessarily distributed way, which is why time and power consuming DAD is considered to be necessary. Just as most, if not all, NAT boxes have preconfigured DHCPv4 service to offer part of preconfigured private address space, home IPv6 routers may have preconfigured DHCPv6 service to offer part of configured public address space. Masataka Ohta