> Maybe this reflects my ignorance, but I don't see why that would be easy,
> even with a government mandate. If compatibility between IPv4 and IPv6 is
> an "insane scheme," then what is the alternative? Just don't use the
> internet for "a year or two"? Come back soon-- under construction!
I suppose one scheme that would have worked is giving everyone both an IPv6 and an IPv4 address-- then, taking away the IPv4 address after a few years.
The problem with this scheme is that, even if the US government mandated the transition, it's not clear that the rest of the world would follow. For example, France could decide that IPv6 wasn't such a great idea, and not mandate it. Since the US kind of likes being connected to the rest of the world, that would effectively derail the transition indefinitely.
Maybe it's time for a new saying to be coined: "If your transition plan requires a world dictator to implement, your transition plan is broken"