At the risk of oversimplifying: “just because you can divide 8 apples between 2 people with long division on paper, it’s a heck of a lot easier just to count off if you can get away with it” But this raises an interesting question; is there ever an actual end? What does IPv6 adoption completion look like? Is there a definition of success? You can almost certainly not buy a physical GP computer today at least that does not support static IPv6 addressing in some manner, at least in terms of network elements. And I could get IPv6 connectivity at nearly any address in the US, (where I have experience) if I’m willing to pay enough money for it. what else is there? Is IPv6 only considered successful with IPv4 is truly turned off? There’s always gonna be people who want 32 bits instead of 128 because it’s easier to carry around in your brain and doubly so if you don’t even need the rest of those bits for what you’re trying to do. The allure of only having to set up a single protocol stack is very strong, but I just don’t see it happening in my lifetime in a “production” capacity. You’re always gonna at least need some broker box somewhere with your last /29 talking to the vestiges of the companies still running exchange 2003.