>
> I will be disappointed if all these anticipated JVM enhancements offer no 
> measurable or noticeable improvement to Java 8 over current versions of 
> Scala.
>
Well, I think there are chances for some minor optimizations due to not 
having to carry around all the class baggage and its semantics.

The only advantage I see is that the byte code is cleaner and doesn't need 
> as many internal Java class files like what Scala generates. This sounds 
> quite minor by itself.
>
Yes, that's pretty much it. 

Personally, I don't care about supporting older Java runtimes, but I expect 
> the Java team to put out something better than what other languages like 
> Scala and Groovy have shipped on the JVM many years ago.
>
That's not planned. For the last decade, the JVM changes have been more 
along the line of “what's the most minimal thing to do to prevent the 
feature gap to the CLR from getting even more embarrassing”.

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