How does the US government run the internet? This is how

USA running the Internet...

There is nothing preventing others from doing their own services deployment and connecting it to the Internet. There is a lot of evidence that indicates that it is often done. If you follow protocol, no one will notice AND you can inter route packets.

And

there were only 47 changes because of all the crap new domains noby uses .christmas fgs

Not sure what the point is

If the rest of the world wants to cut out the US, they can do it today. Just make a copy of the current root zone files, start up their own network of root servers, point all their DNS servers at those root servers instead of the IANA root servers...problem solved. Then they can start updating it independent of the US, and idiots can go suing them to try to take the .ir domain.

Yawn

"Governments across the world have been concerned that the US government could theoretically knock their individual internet registries offline."

The US has had this theoretical power for the last 30 years. They've never used it. Even if they did, it wouldn't stop dotted IP addresses from working and wouldn't stop people setting up alternative DNS nameservers that continued to dish up names for the blocked TLDs.

During that period they have invaded several countries and rattled sabres with several nuclear powers, so I think we can conclude that their reluctance to pull the plug on DNS is not simply a case of "We haven't been angry enough, yet.".