[bluGill]

How far below is the question. It could level out at 60% - that is believable. However it can't level out at 99% - Somewhere around 95% major sites will decide IPv4 isn't worth supporting and they will just ignore that final 5% of customers, which will force them to upgrade - which in turn will give others confidence to remove their final 4% of customers - until IPv4 dies.

[lazide]

There are still ascii dialup bulletin boards out there. and operating model T’s. IPv4 will be around for longer than you or I.

[lxgr]

There are also still Telex and X.25 networks around there, not to forget the whole public telephone network!

But at some point, getting a native connection to all of these started becoming increasingly rare, and now these are largely emulated/tunneled on top of IP. The same can happen for IPv4.

[Dylan16807]

> IPv4 will be around for longer than you or I.

That's a matter for the legacy network on the other side of the internet to handle, as it converts my IPv6 packets to IPv4.