Explore the world of functional programming and innovative language design in this insightful interview with Richard Feldman and James Lewis at GOTO Copenhagen. Delve into the balance between fun and standardization in programming languages, examining adoption patterns of Elm, Scala, and Dart. Discover the newly created Roc language, its motivations, architecture, and unique features. Learn about parsing strategies, performance optimization, and exciting innovations in functional programming. Gain valuable insights into the evolving landscape of programming languages and their impact on software development.