Explore a thought-provoking keynote address from Scala Days Berlin 2018 that delves into functionalist programming language design. Gain insights from Tomas Petricek as he presents innovative ideas and concepts in this 55-minute talk. Discover how functionalist approaches can shape the future of programming languages and potentially influence the Scala ecosystem. Learn about cutting-edge developments in language design and their potential impact on software development practices. Engage with complex ideas presented by a leading expert in the field, and expand your understanding of programming language theory and its practical applications.