Well not having to dualstack is still just nice. No more DHCP4, and so on – e.g. you can have SLAAC as the one and only very simple way of auto-assigning addres

Well not having to dualstack is still just nice. No more DHCP4, and so on – e.g. you can have SLAAC as the one and only very simple way of auto-assigning addresses (in a client setting, obviously not what you'll use with servers that have their addresses listed in DNS :D)