Perhaps, but the languages you mention all have clones on the JVM: Groovy/JRuby, Jython, Clojure, etc. Changing languages doesn't mean throwing away your envir

Perhaps, but the languages you mention all have clones on the JVM: Groovy/JRuby, Jython, Clojure, etc. Changing languages doesn't mean throwing away your environment and previous creations anymore.