Explore the differences between Java Streams and Reactive Streams in this comprehensive conference talk by Venkat Subramaniam. Dive deep into the APIs using live code examples to understand which approach to choose, when to use them, and why. Learn about lazy evaluation, complex programming, internal iterators, immutability, and functional composition. Discover the benefits of laziness in programming and how to handle exceptions effectively. Gain insights into reactive programming, its four pillars, and practical applications such as message-driven systems, responsiveness, and infinite scrolling. Through detailed explanations and demonstrations, master the intricacies of both Java Streams and Reactive Streams to enhance your programming skills and make informed decisions in your projects.