Everyone is always looking for something new. There’s a wealth of information being overlooked. This is very dangerous.
IT doesn’t have a historical base - this is a problem for all of these new languages. People are trying to create a new language rather than solve a problem.
There’s a lot of wasted effort.
In the context of this list of Java concerns, Java and the JVM have provided a phenomenally rich ecosystem in which to build software, the likes of which has not existed before. It is a natural progression to want to explore and evolve this ecosystem with different languages, be they Groovy, Scala, Clojure or Kotlin. There may well be some dead ends (JRuby? Jython?) but I cannot agree that this is wasted effort.