Fringe Languages != FP Languages

In a recent post, a claim is made that functional programming has never been popular and never will be. More on that later, but how does he define functional programming?

The author states: “[D]ynamical type reference languages, which most functional languages are”. He also implies that Python and Perl are FP languages. His definition of FP languages includes all languages that enable the FP paradigm.

There are functional programming languages: e.g., Haskell and F#.
And there are languages that can support the paradigm of functional programming: e.g. arguably every language.

Also, most FP languages are statically typed and host cool type system advancements.