This is great news. We really AWS IPv6 at a prior company I worked for that had about 25 million IPv6 nodes that needed to be addressable, and we had a super ugly back end - 26+ 64GB/8CPU servers (which was a lot back in 2008). We really could have used the flexibility of AWS back then - but, were completely blocked by Amazon's inability and absolute unwillingness to even consider supporting IPv6 on their internal network. Took them almost 8 years (around 2016sh) before they supported IPv6 on their internal networks.