[t0mas88]

That's quite recent. There was some time after AWS started charging for ipv4 addresses where you could not realistically go for an ipv6 only setup behind Cloudfront because it would for example not connect to a v6 only origin.

This is probably a result of all AWS services being independent teams with their own release schedule. But it would have made sense for AWS to coordinate this better.

[tonymet]

You’re right IPv6 has compatibility issues. But for instances needing NAT gateway (no public ip) , they are often good candidates for IPv6 egress.