The T-Flight is a maglev train that hit a record-breaking speed of 387 mph on a short test track — but engineers want to double that rate so the train can carry passengers at speeds faster than if they were traveling by plane.
I'd personally opt for something more "conventional", like the SCMaglev being developed in Japan (or better yet, that Chengdu Maglev prototype). As fast as this train would go inside a vacuum tube, the tube itself will just add much more complexities and points of failure, on top of being more expensive to build/maintain.
Also a large part of the "experience" is also being to watch the scenery pass by at 300-600km/h+ out of the window, which is lost when inside of a very long concrete/steel tube.
I'd personally opt for something more "conventional", like the SCMaglev being developed in Japan (or better yet, that Chengdu Maglev prototype). As fast as this train would go inside a vacuum tube, the tube itself will just add much more complexities and points of failure, on top of being more expensive to build/maintain.
Also a large part of the "experience" is also being to watch the scenery pass by at 300-600km/h+ out of the window, which is lost when inside of a very long concrete/steel tube.