The growth in the number of cell sites, coherent optical ports, connected devices, and IoT devices might suggest that scalability is the most significant challenge the CSPs must deal with when it comes to managing their network infrastructure. However, networks do not scale gracefully or gradually and must be able to react to just-in-time capacity demand with speed and agility. Enhanced, simplified, multi-layer network management is key. The adoption of SDN domain controllers as part of a standards-based, cloud native, multi-layer network improves network management and should be a central element in an IT-based digital transformation journey.