Explore a modern, incremental approach to application migration using Amazon VPC Lattice in this 48-minute conference talk from AWS re:Invent 2025. Learn how to modernize legacy applications through a step-by-step migration strategy that avoids disruptive "big bang" approaches, utilizing Amazon VPC Lattice and other AWS services to facilitate smooth transitions. Discover proven patterns for decomposing monolithic applications into microservices while maintaining business continuity, with real-world examples demonstrating secure communication strategies and multi-account architecture setups. Understand how to effectively handle IP address overlap scenarios and leverage these situations as advantages for Amazon EKS cluster upgrades, gaining practical insights for implementing gradual application modernization in enterprise environments.