It does in theory. But in practice most standard software does not let you manage smaller subnets. For example dnsmasq dhcp config: > The minimum size of the p

It does in theory. But in practice most standard software does not let you manage smaller subnets. For example dnsmasq dhcp config: > The minimum size of the prefix length is 64. In practice, you can patch it and it should work fine. But almost everyone else is against you here. I hope enough ISPs are doing stupid assignment for the limit to be removed one day by default. There's really no sane use for /64 per node.