What's your evidence that it's a "mess"? Either there is one domain system or there are multiple systems and fragmentation. How would you administer it and "s

What's your evidence that it's a "mess"? Either there is one domain system or there are multiple systems and fragmentation. How would you administer it and "solve" it? How would you route ".foo.com." to a set of servers such that everyone in the world can reach them?