Apache Groovy's used for scripting on the JVM, like Bash and Perl on Linux. It's OK for glue code, mock testing, and 10-line build scripts in Gradle. But 5 year

Apache Groovy's used for scripting on the JVM, like Bash and Perl on Linux. It's OK for glue code, mock testing, and 10-line build scripts in Gradle. But 5 years ago, some of Groovy's backers tried to re-purpose it as a competitor to statically typed languages like Java, Kotlin, and Scala, which is when things went awry. If it had stuck to its knitting, it could have been used widely for scripting classes written in Kotlin and Scala as well as Java. But it didn't even keep up with Java -- it doesn't even have Java 8's lambdas on the eve of Java 9's release.