Scala is still a much better java than even Java 9. Even if you don't want to go FP crazy, it still makes sense to at least try 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.