You&#x27;re describing IPv6.<p>I&#x27;m describing IPv4 that uses the current dotted-quad as the network address and adds a new host address: The routing tables don&#x27;t get bigger, AS numbers are 32 bit anyway and unlikely to get bigger, DPI is actually easier than with NAT since there&#x27;s no ambiguity, there&#x27;s no new media types, and upgrades can be done piecemeal.<p>Seriously, it&#x27;s better than IPv6 in every way but one: by being cheaper to deploy companies and consultants can&#x27;t charge extra for IPv6 readiness over a few decades.