Java dominates, also because that's the main source of engineering capacity. There are some notable exceptions though. E.g. invokedynamic from JVM 7 was only r

Java dominates, also because that's the main source of engineering capacity. There are some notable exceptions though. E.g. invokedynamic from JVM 7 was only really used for Java starting at 8 (with the introduction of lambdas), and was partially introduced to better support dynamically typed languages like Ruby on the JVM. The languages do benefit from JVM improvements. Scala 2.12 had a significant speed-up due to native lamba support from JVM 8, and if project valhalla ever lands you can bet all JVM languages will be happy to use it.