Hyperloop is an armchair scientist's back of the envelope engineering. Every single one of us is exactly as qualified to shit on the Hyperloop as Musk was to suggest it. There is no long history of detailed engineering and feasibility studies by thousands of civil and mechanical engineers.

This is the first result of any actual serious thought being given (well actually a bunch of college senior projects) and the winning design already apparently had to cut the speeds by a third (which makes it no faster than a train) and has no space for passengers or cargo.

Let me repeat that: the first serious proposal is no faster than a train and can't actually be used for transporting anything. Making it, as a suggestion for high speed transport, completely useless.