Comment by ironick09

You think that’s why it’s taken so long to move off of IPv4? Surely it can’t be _anything_ else, like lagging support for IPv6 in newer network routing protocols, bug related to those implementations with IPv6, or sometimes no support for IPv6 at all. Similarly for systems and applications that just have no concept of IPv6 at all. To single out the US as the reason why we have not moved off of IPv4 is laughable, the US has a pretty significant adoption of IPv6.