[205guy]

Yes, thanks for putting it more succinctly than I could. I got the impression the author set out to understand 'cd' (which I would love to read about) then didn't, and I don't think we can tell from her article how much she got out of it. I quoted the part about higher-level languages because it's been my experience that a lot of those libraries are ultimately implemented in C somewhere down at the bottom as well.

I will say I did learn about some shell along the way and the bit about processes was interesting and starting to get at the core of 'cd'. It just seems like there are many other pieces of the puzzle, and I encourage the author to keep researching and keep writing about them.