Feels a bit like saying I can provide lots of free electricity, if someone just gives me some perpetual motion machines. Political viability is as important to building something like this as the laws of physics are.

TBC's continued existence isn't very relevant; the point was they/he have yet to build a lasting, full-scale hyperloop, despite his statement they would try. He stopped trying, and I'm fairly sure government approval is far from the only significant obstacle to making a functional and profitable hyperloop anyway.

I might even let go of the hyperloop concept, if they built something else of DC-NYC scale that beats the alternatives in a few measurements.