The thing is Java is improving, so it has become better suited for a variety of jobs. Clojure is 15 years old, which means when it released Java was at version 1.6.

ABCL was separated from J in 2008, when Java was at version. Kotlin was released in 2011, when Java 1.7 was released. Groovy was released in 2007, like Clojure. Scala was released in 2004, when we were at Java 1.5. GNU Kawa was registered on Savannah in 2001, when we had J2SE 1.3.

Now just because Java has become a lot better in the interval doesn't mean those languages have no purpose, but if Java in 2001 had all the nice features (streaming API, try with resources, the Optional type, switch expressions,...) it has now then the JVM landscape may very well have looked very different.