There is a current effort to fully transition the US government internal networks to IPv6 only: https://www.gsa.gov/technology/technology-products-services/...

Considering how many old, IPv4 based management and security tools are probably in use, it will be an exciting time.

Norway is not big enough on Internet scale to make a difference. Equipment and software companies will put in balance the cost vs the benefit and may decide to ignore that market.

Perhaps not by themselves, but every country that does this adds to the weight of the argument.