This chapter has been a wild ride, going from describing principles to core concepts, to being able to understand and even build our own Redux. Time was spent looking at how to deal with AJAX calls and suitable state patterns for that. We learned that there was really nothing much to it. We finished off the chapter by looking at best practices as well. At this point, we are in a considerably better position to be able to understand and appreciate NgRx because we know its underlying patterns and reasons for existing. We can say farewell to this chapter knowing that we will take on NgRx in the last chapter of the book. The aim is to cover the principles and concepts that govern it, how to use it in practice, and also to cover some necessary tooling that will ensure we become really successful.