<Bad imitation of Ballmer> Concurrency, concurrency, concurrency!

Or to say it a different way: Promises, Channels, Supplies.

Seriously though, if the ease of concurrent programming doesn't wet your whistle, I don't know what will.

As Lavar Burton so famously said: "But you don't have to take my word for it":

1. http://www.jnthn.net/papers/2013-yapceu-conc.pdf
2. https://perl6advent.wordpress.com/2013/12/14/asynchronous-programming-promises-and-channels/
3. http://blogs.perl.org/users/ovid/2014/08/try-rakudobrew-and-play-with-concurrency.html