I think this due to Groovy's fragmented ecosystem (Groovy's 2 big recognizable projects, Grails and Gradle, don't play well together) combined with the fact tha

I think this due to Groovy's fragmented ecosystem (Groovy's 2 big recognizable projects, Grails and Gradle, don't play well together) combined with the fact that you can't use Groovy everywhere you use Java.