It looks like the recent trend is blogging about scala-complexity. I thought of writing my own view of things.
Mixing up complexity and limits
Scala has its limits. Some things cannot be done easily. The thing about Scala is that it makes people believe they can do anything with it, they are then frustrated when they can't. The scala-complexity blog post for example, tries to create a method that will work on collections, Java's strings and Java's arrays. Seamlessly. This is something you wouldn't even dream of doing in Java (Note: it is in fact possible to do it.)
