Explore communication options in RxJS for hierarchical component data exchange in this 22-minute conference talk from ng-conf. Dive into the power of RxJS subject objects for creating Observable Services and simplifying state management through an Observable Store. Learn how these techniques offer a straightforward yet robust alternative to traditional state management approaches. Gain insights into implementing an Event Bus and Observable Service, with a bonus section to enhance your understanding. Ideal for Angular developers seeking efficient ways to handle data flow in their applications.