What I miss from this article is what he does know. Not to boats, but to contrast. I know some of the things he does not know, and I'm sure he knows things I don't know. But without knowing what his expertise is, it's easy to think you know more than him.

He's one of the most prominent React core developers. The author of Redux etc. Many JavaScript and React developers (myself included) consider him a rockstar.

You don’t think that’s a problem? I don’t think there’s any value in being a name in programming. There is certainly value in a dollar sense (to their own career prospects at least), but I don’t understand why people would be like “wow! It’s $name! They’re famous!”

If someone non-junior knew no shell scripting and had no FP knowledge — or thought that JavaScript counts as FP [spoiler alert: it doesn’t] — I wouldn’t hire them.

Personally I’m not saying JavaScript “counts” as FP — which is why the post says “unless _you_ count”. ;-) But there are certainly FP subcultures in the JS community which only use the functional subset:

https://github.com/jfmengels/eslint-plugin-fp

https://github.com/fantasyland/fantasy-land

https://ramdajs.com/

That subculture is what I was referring to.

If you’re splitting hairs over such definitions without acknowledging the cultural aspect and use that as a hiring criteria I wouldn’t want to work with you either.