When the network becomes IPv6-based?
According to Google, the IPv6 adoption rate is 30% as of August 2020. Nine years from "World IPv6 Launch Day", when some major Internet service providers, home networking equipment manufacturers, and web companies enabled IPv6 for their products and services. It has also been twelve years since IETF (Internet Engineering Task Force) first introduced IPv6.
Migrating to IPv6 requires significant investments. Updating all servers, routers, and switches that all this time depended only on IPv4 involves a lot of money and time. We do not expect the network to become fully IPv6-based in upcoming years. Till then, CGNAT technology helps ISPs to provide IP-connectivity to their subscribers.