Elon is more akin to Steve Jobs or Bill Gates who are mostly shrewd managers who know their field, rather than someone who is directly involved with day-to-day engineering. He’s certainly no Albert Einstein or even VonBraun.
So far, SpaceX has not really pushed any space boundaries that haven’t already been reached. This doesn’t mean their accomplishments are insignificant, but the human spaceflight boundary is still at the moon. The next human spaceflight boundary will be to establish a permanent human presence on the moon as a stepping stone to leaving earth’s orbit and going to mars. Until SpaceX (or anyone else, for that matter) establishes a permanent presence on the moon, we haven’t really pushed any true boundaries.
To be clear, I do like seeing SpaceX succeed, along with any other companies that are also trying to compete. I just feel it’s important to recognize that these accomplishments have been, and will be, possible only because of many bright people working together. A single person does not make a company (though a single person can weaken or destroy a company, as we’ve seen with Boeing recently).