> what will really drive IPv6 adoption is if the price of IPv4 space continues its upward trajectory unabated ...or the opposite: large cloud providers own a l

> what will really drive IPv6 adoption is if the price of IPv4 space continues its upward trajectory unabated ...or the opposite: large cloud providers own a lot of valuable IPv4 space. They might want to increase the value of their investment. Encouraging switching to pure-IPv6 connectivity would be a big loss for them.