"I can honestly say if someone had shown me the Programming in Scala book by Martin Odersky, Lex Spoon & Bill Venners back in 2003 I'd probably have never created Groovy."
Shortly after saying that, he went on to work on the Kotlin libraries and compiler (not any more, though).
And I'm pretty sure if he had known that line would be incessantly quoted as a slur of Groovy every single time it gets mentioned on Hacker News, he would probably have never said it!