> Scala has its own set of benefits too (incredibly powerful type system, Scalaz, bigger community).
What's the general consensus on scalaz nowadays? Some people seem to think that it is evil itself (or rather the style that it promotes). I'm an outsider so I wouldn't know.
I consider it more important than the standard library. I can't live without it. In version 7 (current), they moved away from using symbolic method names, and now they require 'regular' names, and symbolic method names are optional syntactic sugar. That was by far the most common complaint.