This paper presents a strategic approach to application estate modernization focused on achieving consistency and reducing technology sprawl through platform standardization. Modernization efforts encompass the optimization of deployment architectures, transitioning from traditional Virtual Machines (VMs) to containerized environments, and re-architecting monolithic applications into scalable microservices, alongside judicious cloud migration. We specifically detail a real-world implementation showcasing a successful modernization journey where the adopted strategies simultaneously optimized both application deployment efficiency and underlying infrastructure utilization. This case study provides practical insights into leveraging holistic modernization to drive significant operational and architectural improvements.