I’m sure there are a few hurdles, but wondering what is the biggest reason that keeps us back at this moment as the most pressing thing. Is it that the technology just isn’t there yet? Or is it because of legal complications, international treaties and all that? Is it just not financially feasible to do at this present time with the technology we do have? That we could do it, in theory, but the ROI is too low?
Very fair point. But the biggest barrier is always going to be fuel spent vs potential payload.
Trains an incredibly efficient once built, able to move huge payloads for very low ongoing fuel use.