Why AWS Graviton5 Makes Multi-Arch Docker Builds Mandatory in 2026

AWS Graviton5 (M9g instances) brings 192 cores on 3nm with 25% higher compute, 5x L3 cache, and 30% faster DB performance over Graviton4, plus a Nitro Isolation Engine for hardware-level workload security. Teams must adopt multi-arch Docker builds using docker buildx and manifest lists to target both x86_64 and ARM64, leveraging tools like Tilt for local simulation and GitHub Actions/Jenkins for CI/CD pipelines pushing to ECR.