> i would expect aws needs a year or two from when they decide to charge for something new just to work out the details The price had already dropped, and was

> i would expect aws needs a year or two from when they decide to charge for something new just to work out the details The price had already dropped, and was continuing to fall, when they announced the change, so if rising acquisition cost was the primary reason for adding the IPv4 charge, it had already went away. I think AWS has looked at a utilization graph and sees a time their current pool is get used up at current rates and doesn't want to go through the hassle of acquiring more IPv4 addresses, regardless of cost (even if it is "cheap"). I also think that they have statistic for their www.Amazon.com storefront, and maybe are seeing a good proportion from IPv6 and so figure that there's a 'critical mass' (especially mobile).