> And still, in the year of our lord 2026, GitHub does not support IPv6.

Especially given that it is now owned by Microsoft, which has been working on IPv6-only (at least on their corporate network) for almost a decade:

* https://blog.apnic.net/2017/01/19/ipv6-only-at-microsoft/

* https://www.arin.net/blog/2019/04/03/microsoft-works-toward-...