Zbynek,

The choice for having a NAT64 was to provide a more gentle headstart,
since a NAT64 has a strictly bigger set of apps/sites that do work.
And, we felt that we should tread lightly - maximize the potential of
actually using the v6only as a "business as usual" SSID.

The "true IPv6-only" was a DNS server address away: e.g. you could
temporarily hardcode the 2001:4860:4860::8888 for the tests, instead
of the DNS64 local resolver address.

But would be very interesting to hear from the community, what would
people think is the most useful option to do ?