I mean you can replace all this with “airline travel”. Already nations can shoot down airliners that travel within hundreds of kilometers of top end air defense systems like the S-400. So if a one of the central European nations decided to make anywhere they can hit a ‘no fly zone’, and they had nukes so no one can invade, they could de facto ban air travel in Europe.
This is true for a lot of technologies—ultimately this planet is small.
I mean you can replace all this with “airline travel”. Already nations can shoot down airliners that travel within hundreds of kilometers of top end air defense systems like the S-400. So if a one of the central European nations decided to make anywhere they can hit a ‘no fly zone’, and they had nukes so no one can invade, they could de facto ban air travel in Europe.
This is true for a lot of technologies—ultimately this planet is small.