[quatrevingts]

Don't be. He's basically thinking out loud about two languages he knows very little about. It's an entirely content-free post, but because he's famous there's evidently a danger that people might take it seriously.

The fact that he clearly knows so little of Haskell is what's most telling - you shouldn't be taken seriously as a language critic if you don't realize that Haskell also has all of those scary things he lists from the Scala table of contents, with the exception of variance annotations (since it's not OO).