These days the Kotlin DSL is treated as a first class citizen and you can find examples for most common tasks in either language. But Groovy is pretty easy to p

These days the Kotlin DSL is treated as a first class citizen and you can find examples for most common tasks in either language. But Groovy is pretty easy to pick up too, you definitely don't need to know it before you start using it with Gradle. Aside from the performance implications, Gradle excels when used with more complex builds with many steps. If Maven works for your use case, your build scripts aren't unmanageably long, and your team doesn't mind XML, there isn't much of a reason to switch.