Let's not make the splinternet a reality, pretty please.
Chinese scaling and manufacturing, Russian IT expertise, Iranian experience of sanctions evasion and North Korean hacking and remote operations mastery are not the combo you want to bet against.
They would absolutely build the self-sustaining economy and rival networks, but in the process it would destroy the Internet as we know it, and break communication channels that are vital for democracy and international peace, while also breaking communications between relatives and friends on the two sides.