https://www.theregister.co.uk/2018/06/10/network_roundup_june_6_2018/

Roundup Last week saw celebration in the IPv6 community this week – not because adoption is finally really taking off, but because, umm, look, something must have happened, right?

Well, yes, kind of: in spite of first being authored in 1999, IPv6 lay fallow for more than a decade, even though we all knew the world would run out of IPv4 addresses. The “IPv6 Launch Day” that happened on June 6, 2012, was a cross between official switch-on by a bunch of US service providers, and promotional exercise.