"Ultimately the goal of IPv6 is to end IP scarcity" That is a goal, and perhaps the primary goal, but there are other goals as well. IPv6 makes the Internet i

"Ultimately the goal of IPv6 is to end IP scarcity" That is a goal, and perhaps the primary goal, but there are other goals as well. IPv6 makes the Internet itself more efficient by reducing routing overhead and it simplifies network management. Of course, what will ultimately force ISPs and services to switch to IPv6 is IPv4 address space exhaustion. As the price of a public IPv4 address rises people will begin to more seriously consider an IPv6-only approach, even if it means losing a few users (especially since ISPs will have to make IPv6 available once such services become popular). It has taken longer than expected as various approaches have squeezed the last bits of utility out of IPv4, but it will eventually happen as several billion more people are connected to the Internet.