Also, Wolfram is all nice for how he did this all by himself and how he let us use big tower of ideas and technology he built, also by himself, over the past 40 years.
edit:
on a related note, how does it compare with IPython/Jupyter?
You can do some of it from free-to-use services like Alpha.
Also, good god does he love to take credit. There's whole teams of people who work on the underlying technology that powers it, although he does credit the guys who come up with algorithms that they use, especially when documenting them, but you have to dig for that... and then there's the people that gather, purchase and curate data sets that power the Knowledge Base, and even the SMP engine that became Mathematica was a group effort...
Which is why I'll never pay for a Wolfram Research product, as interesting as or powerful as it could be. All it does it serve to support the legacy of an egomaniac.
He's certainly a force of personality, but he's more of an ideas and money guy. A backer.
Eberhard was the guy who actually thought sporty electric cars would work, took a shot, and was right. It's too bad he got forced out.
"the man is pure inspiration. 10 years ago, i was asked who i admired, and couldn't think of a single answer. Maybe that's sad on my part, but when asked now, he's at the top of my list." https://news.ycombinator.com/item?id=9546353
It does seem like maybe the pendulum is finally swinging back a bit, though.
Wolfram talks about how personally incredible he is, and how his work is revolutionary, and how he's this Great Mind who's laboring away on some perfect thing. Musk talks about how incredible his companies are, and how they'll change the world, without ascribing all progress to himself personally.
It seems like to be equivalent, Musk would have to stand up on a stage and give a talk about he personally invented rockets, or at least how he's doing great things based on his own theories about rockets.
Likewise, Wolfram has published some interesting papers on CA and Mathematica is great for it's problem domains, but ever since NKS I think he's forgotten the maxim cautioning to not get high on one's own supply.
For those who haven't seen it yet, this letter from Richard Feynman to Wolfram might be interesting: http://www.lettersofnote.com/2010/06/you-dont-understand-ord...
He seems to have contributed a valued product that is used by many and is strictly an advantage in many domains.