This document discusses the benefits of using Scala with Vaadin, including a simple programming model without JavaScript, security from all server-side code, beautiful widgets and themes, and performance advantages over other frameworks like PrimeFaces. Scala allows for a more declarative programming style, inline component constructors, delayed initialization, callbacks and higher-order functions to reduce coupling, localization with symbols, navigating nested objects, and eliminating dependencies with structural types. Hot reloading of classes is also possible with JRebel for Scala applications.