I assume you meant 10.x.x.x and 192.168.x.x -- (and 172.16.x.x?), ie the standard subnets for home router-modems (which are non-routing and so can't be used on the internet).
Of course... this would transitionally make the ipv6 internal addresses easier to understand in the context of typical migration... you have the public prefix and the public ipv6 addresses of your internal network map cleanly to the internal/nat'd ipv4 ... you could still use any ipv6 internally once most of the internet transitioned.. but it'd be easier to reason with at least... I still don't know WTF/HTF ipv6 addresses are issued, where or how I can centrally control static assignment to a given MAC.