A detailed rebuttal of musks boring ideas is clearly not the point of the article. But those articles for exist, for example this one (which includes a citation

A detailed rebuttal of musks boring ideas is clearly not the point of the article. But those articles for exist, for example this one (which includes a citation that cost may scale linearly with diameter): https://pedestrianobservations.com/2017/12/15/elon-musks-ideas-about-transportation-are-boring/ https://pedestrianobservations.com/2017/12/15/elon-musks-ide...