APL/J/K/NIAL

What's so special about array languages? When I look at them all I see is a decent Math library on top of a rather poor and antiquated language. On Wikipedia and sites of those languages people rave about how much more concise than other languages they are and how learning them expands your horizons and makes you a better programmer but except for higher order functions, which may have been special at the time APL was invented, but now are present in almost every modern language, I don't see any features that come close to what Haskell, ML, Scala and the likes offer.
Am I missing something?

>>5
They do have semantic conciseness. You won't understand unless you learn one of the languages in question--and actually use it for things.

A point I'd like to make about having higher order functions; it isn't necessarily a big deal, but some languages benefit more than others. Some languages absolutely depend on it, and that will absolutely make you a better programmer.

The tl;dr is if you can ask "am I missing something" about a programming paradigm you haven't completed a few projects in, the answer is always "yes."