Explore Martin Odersky's comprehensive tour of Scala 3 in this 56-minute conference talk from Scala Days Lausanne 2019. Delve into the latest features and improvements of Scala 3, including toplevel definitions, enums, extension methods, delegates, match types, and typeclass derivation. Gain insights into the roadmap for Scala 2.13 and understand the synergies between versions. Learn about the reasons behind the numerous new features introduced simultaneously and the importance of Tasty for binary compatibility. Discover how Scala 3 builds upon its predecessor while introducing significant enhancements, making it a powerful evolution of the language rather than an entirely new one.