Sean, you've written in the past that you tried Scala 7+ years ago; any reason beyond working for M$ that you don't give it another look? It's certainly improved a ton since your explorations during the stone ages of Scala ;-)

For example, you probably were never able to take advantage of type classes, (G)ADTs, value classes, recursive types, exhaustive pattern matching, etc., etc. back in the day.

Would be nice to have an OO expert/advocate on the Scala side of the fence to provide a counter point to the FP wave.