Those languages complement Java on the JVM to varying degrees. Kotlin and Scala were built to progressively replace Java in a codebase. Clojure was built for the JVM as its first target architecture. Apache Groovy was originally to script Java code, e.g. tests and glue code. (Although Groovy was later repurposed as a Java replacement in Groovy 2, not many people use it for that.)

Agree with your assessment of Groovy. It made the JVM easy to use for simple scripting and served a really good purpose as glue language between big monolithic JVM software systems.

I haven't used it for awhile now, but I used to work on a serious Groovy code base. It's out of it's league now. Once Kotlin's scripting story gets rolling it should eat the rest of Groovy's lunch.