A lot of the tooling is reusable. Profilers, debuggers, build tools, libraries all work. And IntelliJ IDEA has been doing a good job with its support for multi

A lot of the tooling is reusable. Profilers, debuggers, build tools, libraries all work. And IntelliJ IDEA has been doing a good job with its support for multiple languages, having great support for Scala, Kotlin, Groovy and JRuby at least. There's also great support available for Clojure built by a third party. Yes, I think you get most of the advantages of Java. There's a learning curve involved for Java developers of course, but it's very incremental because the underlying platform is the same and this matters.