Yes, and here the author also makes mistakes. Founding Tesla is irrelevant; results of Tesla are. Saying that reusable space launchers existed before SpaceX is

Yes, and here the author also makes mistakes. Founding Tesla is irrelevant; results of Tesla are. Saying that reusable space launchers existed before SpaceX is like saying there were people in America before Columbus - technically true, but Columbus achievement is colossal, similarly the achievements of SpaceX. But we're comparing billionaires and governments :) - will you say Space Shuttle, or Buran, are comparable to Falcon 9? Author didn't provide any arguments for Mars colony's plan :) so let's not get there. As I said, the article is very questionable - and not because billionaires couldn't use some healthy attention, just because too many statements in the article are doubtful.