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?

Apart my S→BB failure, APL is a rather powerful language, you can do complex things with small effort, too bad it's even more a write-once/read-never language than Perl.
Don't know if array languages really are more mind-opening than functional languages, but you could just use Lisp and implement an array-based DSL with macros.