War Story: Saving $200k/Year on AWS by Migrating 50% of Workloads to Graviton4 with Terraform 1.10

In Q3 2024, our 14-person platform engineering team at a mid-sized fintech slashed annual AWS spend by $203,417 — a 34% reduction — by migrating 52% of our production workloads to AWS Graviton4 instances, managed entirely via Terraform 1.10’s new ARM64-native module support. We didn’t cut features,