Comment by yogthos

It's not just my team, there are many of people working with Clojure and other functional languages out there, and there are plenty of FP projects in productions in pretty much every domain.

Functional programming is weird in the same way Japanese is weird to an Anglophone. A person who learned Japanese as their mother tongue will find English equally weird. The comments in the link you posted already address the points the author tries to make, which all boil down to FP being different from what they're used to.