Earlier quoted context omitted.
SpaceX rockets use C++, however if you can use C++ I really do not see how hard javascript can be.
It's not about it being hard, it's about this mentality that software == web development. There is so ( so ) much more software running different applications. I'm not saying that the developers of this site actually think that the world literally runs on JS, but I found that sentence amusing and somewhat ignorant. I work in systems. I don't really know JS. I do know C, C++, C#, Haskell, various dialects of Lisp, Pyt…
Where's the github for assembly line firmware code? I would be very interested in learning more about other non-web-development domains, but it seems like unless you get hired right out of school to program something like cars or satellites, you're pretty much shut out forever.