Why Modern IPv6 Failed This Kubernetes Networking Test

So... why? The article only mentions "the Medicube installer, based on OpenStack’s Ironic, “created completely wrong configurations for IPv6.”" and "Certain Dell BIOS implementations lacked complete IPv6 boot support, and when present, were buggy". The former sounds more like it's a failure of the Medicube installer rather than of IPv6, and the latter sounds more like a failure of certain Dell BIOS implementations.

It says the BIOS problem is fixed and they're using a custom deployment tool now, with no mention of them needing to move off of IPv6. They're running "a record-breaking Kubernetes cluster" on it, so it sounds more like it succeeded rather than failed?