I think there needs to be some disambiguation.

Richard Branson’s Virgin Hyperloop One is literally a train. They themselves call it a train. I guess the idea is that they’re small individual cars (called pods) instead of a chain of train cars connected together, which seems really energy inefficient.

Elon Musk’s Hyperloop is a train for automobiles, which has all the inefficient downsides of a personal car, with none of the energy benefits of a train. It is the worst of both worlds. And it relies on car infrastructure at both ends, so it will bottleneck just like a highway on/off ramp. Completely nonsensical.