I’m not advocating full separation. That would be both counter-productive and practically impossible. But in the same way that China started with special economic zones for free international trade (a concept which both the DPRK and Cuba have since also implemented), nations could have dedicated “entry-ports” to their national internet, through which interfacing with the global internet can take place in a controlled way, in a safe space, without fully surrendering control over their national digital ecosystems.