- Few now, but more soon as ISPs ramp up IPv6 deployment - Almost none require v6 - It provides future compatibility as the v4 address space is (effectively)

- Few now, but more soon as ISPs ramp up IPv6 deployment - Almost none require v6 - It provides future compatibility as the v4 address space is (effectively) used up and can't cover new services joining the internet in the future. Full Internet conversion to v6 is critically needed and inevitable. Supporting it on a large service like AWS accelerates familiarity with the technology and enabled more people to silently begin making use of v6.