[valw]

> The most telling sign is how many FP languages are in existence today. If it was such a good thing we wouldn't need them all.

This is a silly argument. FP means only first-class functions and immutable values, and the vast majority of FP languages agree on those.

But there are many other design decisions for a programming language - type system, laziness, purity, homoiconicity, and whatever other features, paradigms or constraints people might find desirable. THIS is what explains the diversity of FP languages.

Btw, there's the exact same phenomenon in OOP languages. They all agree on classes, and differ on hundreds of other aspects.