The spirit of the article was to praise the fruits of SV culture, in which Elon Musk is a revered leader. But yeah, if you want to be pedantic, yes space x is in Southern california.
If you include companies who aren't in SV in an article about SV. What's the point? I guess any startup that is SV funded is assumed to be a SV startup?
Maybe it's a stretch but anything Elon could be seen as an off shoot of the successes of SV. He started and sold Zip2 and PayPal there. He used the money from those ventures to start SpaceX and invest in Tesla. Also iirc much of the capital for these ventures comes from SV players.
