I know you didn't mean exactly 20 year old languages but felt the itch to look it up - 2003 was a year of JVM languages[1]. Groovy and Scala are dated 2003. (Cl

I know you didn't mean exactly 20 year old languages but felt the itch to look it up - 2003 was a year of JVM languages[1]. Groovy and Scala are dated 2003. (Clojure came a bit later, in 2007) [1] https://en.wikipedia.org/wiki/History_of_programming_languages https://en.wikipedia.org/wiki/History_of_programming_languag...