I didn't even think about that, but yeah he totally did.

This whole article has a very "Wow, all other languages except for the one I've invested time in really suck!" feel to it. The arguments presented are shallow at best, rely on short-term data, mostly just popular trends of what people are talking about/searching for.

There's not any empirical evidence that I've seen in this article that suggests any language is better than any other language.

Does anyone actually use Flow? I see TypeScript all over the place.

Last time I checked, its not available on Windows. That automatically limits its market.