I feel like Perl 6 is on the top of my "would love to learn, but can't find a good reason languages". Every time I read an article about it I mentally go "Cool! I never knew I really wanted this $thing".
Perl is the ultimate hacker’s language. It is something you work and learn alone, at night. You barely can even show your code to anybody else, but it is a superweapon that helps your productivity in other languages, and helps you with your personal tasks.
How would you compare Perl to Haskell (i.e. in terms of mindexpansion) and APL (i.e. in terms of learning how think tersely)?