[wmf]

IPv6 without any transition mechanism is not Internet access. It's more like a tenth of the Internet. If an ISP has to buy a few addresses to run NAT64 that's a cost of doing business.

[jchw]

What happens when there are literally truly no IPv4 addresses left for sale? Not today’s reality, but the clock is ticking.

[wmf]

There will always be IPv4 for sale just as there is always land for sale.

[teddyh]

This is the “oil will never run out” argument. Technically true, but irrelevant.

[wmf]

I chose my analogy carefully. Oil is consumed but land and IP addresses are not.

[jchw]

You can't really just "find" more IPv4 though. Cloud platforms are eating blocks for breakfast, lunch and dinner, and while it's always going to be for sale, there's no reason to expect you'll be able to afford it.

[wmf]

Fortunately, if you can't afford IPv4 then no one else can afford it either, which means the incentive to adopt IPv6 is extremely strong and thus you no longer need IPv4.

[8organicbits]

It works both ways though, doesn't it? If you are IPv4 only, you can't access/can't be accessed from the whole internet. If you are IPv6 only, same applies.

[wmf]

No, because there is nothing interesting that's IPv6-only.

[tankenmate]

That depends a great deal on what country / language is your norm.

[p1mrx]

Which country/language has interesting IPv6-only content?