Just to be clear I'm not advocating everyone write their own anonymous function-object every time they want to map over something, just that "x -> x * x" can be

Just to be clear I'm not advocating everyone write their own anonymous function-object every time they want to map over something, just that "x -> x * x" can be short hand for such a function-object with nothing lost. Industry OO doesn't seem much like OO at all. C# constantly adding new and innovative syntax to make getters and setters as simply as possible (much simpler than writing an immutable class with a proper constructor) suggests to me my views are a bit fringe as well.