For those who think it's because of geography / hyperloop is better technology anyways / any other red herring besides Brezhnevian political stagnation:
It's not completely implausible that, 30 years from now, most of Europe and Asia are connected by hyperloops while the US has built nothing and Internet commentators are arguing that hyperloop is old news compared to yet-unproven teleportation technology, and anyways the population density of the US doesn't support hyperloops.
It's not completely implausible that, 30 years from now, most of Europe and Asia are connected by hyperloops while the US has built nothing and Internet commentators are arguing that hyperloop is old news compared to yet-unproven teleportation technology, and anyways the population density of the US doesn't support hyperloops.