> Musk is in the car industry, one of the hardest hurt by unions and their ilk, so I would find it hard to believe that he didn't take that into account.

That is irrelevant. He did not go into Tesla honoring the contracts that were put into place by GM, Ford, Chrysler and others. Those companies actually have tens of thousands of very well paid workers sitting around --literally-- all day doing nothing due to union contracts dealing with automation and other issues. He, in other words, did not experience the almost surreal lunacy that the full union experience can be.

I'll give you an example of this. Las Vegas Convention Center. Trade show. Small booth, 20 x 20 ft. I needed the lights on top of my booth turned off so that I could control my own lighting. No problem, we can do it for $360 per light. I asked what was involved. The response was that they'd have to throw a switch. Same thing at the RAI in Amsterdam. Free. Same thing in Munich (forgot the name of the venue), free. Same thing in New York City, $400.

Want another example? Again, Las Vegas Convention Center. I could not hookup my own computers. Somehow, magically, once you enter union-land the engineers who actually design the equipment are suddenly incapable of properly connecting equipment into power outlets. No, union electricians have to wire your booth at a massive fee. If you screw around with them they will literally use mafia techniques and shutdown your booth without so much as a hint in the middle of a show. I've seen it happen.

So, yes, again, just because the science is brilliant it does not mean it can be built. I've made that mistake before. I've dealt with city and state governments. I have sold product to the US government as well. I have equipment in places like the White Sands Missile Test Range and other notable spots. In some cases things flow smoothly. This is ALWAYS --and I do mean ALWAYS- the case when unions are not involved. If unions are involved, watch out! Enter surreal nightmare. The only way to have it not be surreal and not be a nightmare is to have some kind of an in or pay off the right people. What, that doesn't happen in the US? Please.

> Again, Musk is building and selling electric cars in a country that LOVES gas guzzlers. His track record would suggest that he knows what he's doing.

Tesla sells 20K cars per year to folks who can afford an $80,000 car. I love what they are doing. I am waiting for their SUV's and will likely buy two of them. But, please, don't make the comparison you just made. The other car companies are selling nearly A THOUSAND TIMES more cars than Tesla per year.

He does know what he is doing. I did not say he is not. I am simply proposing that the Hyperloop might be brilliant on paper but, barring a political, labor, fiscal, environmental and who-knows-what-else miracle it has zero probability of ever being built beyond, perhaps, a very expensive test setup.

>I don't know why you think that this paper/concept only addresses technological issues, because it is clearly much more broad in scope than that.

I don't think it addresses enough of the real world issues. When everything else is cleared off the table you still have to build it in the real world. And I think that's where the real problems lie, not in the science.