It's nice that they are expanding. But I really wish they would add IPv6 support for EC2 instances. It sucks to not be able to natively use IPv6 for UDP applications on EC2 :(
- 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.
I use it as a filter too. The people who have implemented ipv6 are ahead of the curve so I look on them more favourably.