[wideawake]

It would be far easier to build a high-speed train route from Beijing to London through Russia, an almost entirely overland route with much easier conditions - but that hasn't even been suggested.

Why? Because there are multiple daily flights to London, New York and LA from Beijing.

[HamiltonJay]

The focus of this isn’t personal travel, as it is freight, and freight via air is quick but relatively inefficient. Can only pack so much into a plane.

The point of something like this would be to compete with boat, which is still relatively slow.

An underground tunnel, levitated train in a system with no atmosphere would allow insanely fast freight movement and virtually unlimited volume... just add another car.

This idea isn’t as far fetched as some think, but it is an very expensive proposition but very much could be commercially viable.