Yeah, this was my initial confusion with the article and many of the comments. When I read the doc by Musk, I assumed, that the tube 'floated' over the pylons. The author seems to have assumed the opposite. The problem is that they are both assumptions.
When making an argument, sometimes it is good to make an assumption and then prove the assumption is false... sometimes it is just a straw man.
When making an argument, sometimes it is good to make an assumption and then prove the assumption is false... sometimes it is just a straw man.