Interesting, maybe we should revoke IPv4 assignations to Apple, Ford, HP, Prudential etc. who aren't using anything close to the 16 million IP addresses they have.
Sure, NAT and a few more blocks will help. For a while...
With the recent IPv4 address burn rate — the allocation rate the last remaining addresses block were issued — reclaiming a half-dozen /8 blocks would be a rearguard action at most, and an effort and a hassle that would detract from IPv6.
For data, select the column with the IANA date sort here:
and then consider how long a few more added /8 blocks would really last. By my count, fourteen /8 blocks since 2009. And the rate that network-connected devices are arriving isn't slowing.
In some cases those addresses are used but they are NATed behind different public IP addresses. (No, we can't use 10/8.) But now that each /8 is worth almost $200M, just wait for a slow quarter and those addresses may find their way to people who need them.
