Crystalline coordination polymers are a chemically diverse material platform that provide control over network geometry and chemical interactions, harbouring a wealth of phenomena of large scientific and technological relevance. The underlying structure together with chemical interactions play a crucial role, factors that together determine the underlying free energy surface of a material, i.e. its physicochemical properties. Here we discuss selected phenomena and research examples related to structural flexibility, identifying the underlying free energy landscape in coordination polymers as a scientific discipline unifying component that can help to further support cross-communication between different research areas. We finish by advocating the roles of concept-based thinking, interdisciplinarity and a progressive attitude in advancing the field in the near future.