On 16 sep 2009, at 18:40, IETF Member Dave Aronson wrote:
Ten years out, who knows? Maybe.
However, even then, that will affect almost exclusively devices with *public* IP addresses. The gazillions of devices behind NATs may also need to speak IPv6 when connecting to the outside world, but will have little to no need to give up IPv4. Neither will those on completely private networks.
What's the point of running IPv4 when you can do everything you need to do over IPv6? (Note that it works the other way around, also...)
IPX, DECnet, AppleTalk etc disappeared from view pretty quickly as IP conquered the world.
But before the bury IPv4, it would be a good signal to make IPv6 a full standard.
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