[virmundi]

I think part of the answer is that for many functional is a new hotness. The same thing happened with Scala (probably still does). With type inference and functional shortcuts, you can get a lot into one compact space. This is "impressive".

The other thing is that experience brings the ability to track what's going on. The formulation of the answer here is probably new to you. As you get use to this, or Streams for Java, or threading for Clojure, etc, you'll understand it by default.