I for one hope that it never happens! To me Scala is a puzzler generator. I prefer complex, but readable code instead of shorter code whose complexity - and bugs, and unforeseen interactions - have been hidden away by the pantagruelic grammatical structure of a programming language.
Java generics, by the same author of Scala IIRC, were supposed to make our lives only simpler. They usually do. But then they also brought in type erasure; they introduced compiler warnings, their suppression mechanisms, and the concept of "unsafe" code into the language; we started to see confusing signatures such as Enum<E extends Enum<E>> ...