[Macha]

I honestly think GitHub and AWS are the two biggest blockers to IPv6 left. Sure your public web servers might need IPv4 for a long while yet, but all these backend microservices and CI builds etc could all be v6 only, except they need to pull stuff from GitHub or certain AWS services.

[Sanzig]

It's particularly aggravating with AWS, since they charge for IPv4 addresses yet many of their services aren't IPv6 capable.

[Dagger2]

They do seem to be making progress on that: https://aws.amazon.com/new/?ams%23article-feed%23pattern-dat...

They've enabled v6 on an average of something like two services per week for the past year... but they have a lot of services.