Too Long; Didn't Read
SwiftUI and Combine, Apple’s latest frameworks, were the highlights of the WWDC. The long-expected declarative UI, at last, became a reality, and this is truly an event of historic proportions in the world of iOS development. Combine is basically an implementation of the Functional Reactive Programming (FRP) paradigm. It allows you to concentrate on events that determine the business logic of the application, instead of spending time on dealing with a large number of details. All this allows reducing the amount of implementation details.