I'm not a native speaker, so I apologize.
> The "IPv4-Compatible IPv6 address" is now deprecated because the current IPv6 transition mechanisms no longer use these addresses.
«We forbid you to go right because we are going left.» It doesn't look like a technical issue. How I should call it?
I haven't heard it called a political issue before though. It just had problems, like being blocked in firewalls and security problems where the encapsulated packet wasn't checked properly, etc.