Scala is a cool language running on JVM, agree?
It is constantly changing and so is JVM so what do you need to know? Check out Pitor Przybyl's talk from Scala Love in the City Conference.
Checking out JVM 12-16
Scala is a cool language running on JVM and constantly changing. The same applies to JVM, which is running under the hood. What a Scala developer should know about changes in JVM? In this talk we’ll cover the major JVM changes and scratch updates to Java language.