This has the same drawback as the hyperloop as far as being one long line of potential single points of failure. If the train is going fast enough to be economi

This has the same drawback as the hyperloop as far as being one long line of potential single points of failure. If the train is going fast enough to be economical, it can be catastrophically destroyed with minimal interference. At those energies repairs would be non-trivial. Unfortunately we need a safer world to build this project than one where state actors destroy major pipelines and bridges as a routine part of economic warfare.