My actual concern is our ability to maintain it. A good friend of mine who is a civil engineer specializing in trains has been involved in proposals to build things like mag lev trains in the US. His determination is that we generally do not do a good enough job of maintaining infrastructure for projects that require high tolerances. We like to build it, we like to run it, but maintenance... not so much. Hell even the bullet train in Japan, just a rain system, has a train packed with instruments that runs the tracks regularly looking for imperfections and issues, we can barely keep our bridges standing. What are the odds that we take sufficiently good care of the hyperloop system in order to keep it operating safely.
Perhaps we will develop it and the rest of the world will use it, but if we want to have nice toys like this we need to start dealing with the maintenance of such infrastructure (and maybe our other existing infrastructure while we are at it)