I think major failure of Kubernetes was not being IPv6-only from the beginning. Its model of every pod having own address works much better with IPv6 where addresses are cheap. With IPv4, it needs complicated overlay networks. The cluster boundary would also make a good place for NAT64 proxy.
Kubernetes didn't get IPv6 support until later, and it sounds like it isn't reliable yet.
Kubernetes didn't get IPv6 support until later, and it sounds like it isn't reliable yet.