[jrs95]

IMO it's just the syntax that comes across as really bizarre. Scala is much more complex than Clojure aside from the initial hurdle of getting used to that syntax.

Personally I think it's less about FP vs OOP -- even if the OO parts of Scala are familiar, you're going to encounter FP code in Scala, and in general there is a lot more to learn with Scala as a language just to be able to read other people's code effectively.