I haven't caught up with the Groovy team in a while. I am going to do a Spock testing video soon which will cover a little bit of Groovy, but maybe we should schedule a Groovy features support video soon?
"This change introduces the early stages of Java code completion based on machine learning (ML), which is an alternative to the standard ranking mechanism. It applies rules learned from data we have gathered anonymously during our EAPs, which results in better suggestions." - blog.jetbrains.com/idea/2020/10/intellij-idea-2020-3-eap5/