Reactive Code is Sequentially Cohesive
Reactive, declarative code is sequentially cohesive: you have a sequence of events and reactions to events, and it’s pieces are tied together real close. The processing chain itself is then a function or feature of the app. The chain of operators is a thing itself; the step-by-step transformation is then reified into a sequence in one place: it has a beginning, an end, a sequential order of steps.