> I'm not clear on why you think a hyperloop between major cities (eventually replacing the current high-speed lines)
Why would you replace perfectly good existing infrastructure that is used not just for high-speed rail in Switzerland with an entirely new, untested, incompatible system that will provide little incremental benefit while severely crippling the existing rail network?
High-speed rail lines in Switzerland aren't isolated, different-gauge networks like Japan, they are largely part of the same rail network, just with higher speed limits.
Take the new Gotthard Base Tunnel, while it has an operational speed of 200km/h for passenger rail, it is also extensively used for cargo trains (at lower speeds). Building it didn't just reduce the time for trips between Zurich and Milan, the main Nort-South route, but for anyone travelling from the north side of it to the south side of it, as current trains can run through it just as any other railroad.
Particularly, it has a massive impact on cargo, as it was designed from the beginning to reduce congestion in trans-alpine cargo routes. It provides massive network effects not just to Switzerland, but to all of Europe.
Replacing something like this with Hyperloop isn't just a bad idea, is a complete disaster.
Switzerland is probably the last country in the world to need something like a Hyperloop. No wonder we thought about it 50 years ago and shut down the idea:
https://en.wikipedia.org/wiki/Swissmetro