In this chapter, we will explore areas where Elm really shines. As mentioned in the Why Elm section, Elm provides quite a few benefits that are lacking in most mainstream languages: immutable values, pure functions, fuzz testing, a powerful type system, pattern matching, and the absence of runtime errors. We will dig deep into each of these topics to understand why they are considered benefits. By the end of this chapter, we will have a whole new appreciation for Elm’s simplicity and power.