I agree with him - what Guava brings (functional programming, better safety in types) is something that is better done at language level like in Scala. Either

I agree with him - what Guava brings (functional programming, better safety in types) is something that is better done at language level like in Scala. Either you like Java and you don't need Guava, or you want functional programming and other goodness and for that Scala is a better language.