When I finally picked up a book on Scala, I rejoiced when I read the chapter on parallelization with Actors and especially how they passed case classes around and automatically extracted data from them in their built-in switch statements. That stuff was fantastic!, concise, expressive and beautiful! Hallelujah!

The next chapter delved deeper into the typing system, and I recoiled in horror.

I still want to do Scala some day just to use their actor messaging, but there really is a very strict limit to how far a sane person can look into Scala. At some point, the Abyss looks into you, and if you're not careful, you'll also start building crazy DSLs with incomprehensible operators based on Type Declarations Man Was Not Meant To Know, just to maintain rigid type safety in some situation nobody really cares about.