Preferring sealed classes over enums

Coming from Java, you may be tempted to overload your enum with functionality.

For example, let's say you build an application that allows users to order a pizza and track its status. We can use the following code for this:

// Java-like code that uses enum to represent State
enum class PizzaOrderStatus {
    ORDER_RECEIVED, PIZZA_BEING_MADE, OUT_FOR_DELIVERY,      COMPLETED;
 
    fun nextStatus(): PizzaOrderStatus {
        return when (this) {
            ORDER_RECEIVED -> PIZZA_BEING_MADE
            PIZZA_BEING_MADE -> OUT_FOR_DELIVERY
            OUT_FOR_DELIVERY -> COMPLETED
          ...