[dajonker]

Of course you can subnet ipv6, in fact I run several ipv6 subnets at home. You have to delegate a different prefix to each subnet.

[tsimionescu]

They said that you can't subnet a /64, not that you can't subnet in IPv6. And while technically you can subnet even a /64, it's not supported by SLAAC, which means that, for example, you can't get an Android phone to work with auto-assigned addresses in a /80 IPv6 network.