I have come to think that having both SLAAC and DHCPv6 were a big flaw in IPv6. SLAAC is awesome but having two config mechanisms is confusing. It doesn't help that Android refuses to support DHCPv6.

I think SLAAC came from world where computers were expensive, DHCP servers were separate, and they wanted to eliminate them. But we are in world where computers are cheap and every router can run DHCP.

We could have had easy config with DHCPv6 giving out MAC based addresses by default. The auto config would still work on link-local.