Earlier quoted context omitted.
Why does IPv6 availability matter here? The amount of users that need, want or even directly benefit from IPv6 is vanishingly small.
I disagree. Directly, yes, the average user doesn't care. But application developers care; peer-to-peer protocols become a lot trickier with IPv4 due to the pervasive deployment of NAT; two machines ostensibly on the Internet can't connect to each other, requiring instead the use of STUN servers, which then requires infrastructure somewhere, or just doing it client-server, or some mix like having "supernodes" (like S…
IPv6 has been around for almost 20 years now, and is only recently cracking 10% (and I wonder how much of that 10+% is also dual stack). IPv4 sure as hell isn't going away in my lifetime. Who knows, maybe the lifetime of my kids too. What a mess!