"On AWS, switching to ARM instances can be an effective low-cost way to reduce significant costs. Hence we carefully migrated to arm64 (ensuring all dependencies are compatible), which resulted in better cost and faster performance."<p>This is not shocking at all.<p>My question is this: Did you look at your total spend and price out Systems admin's, rack space, hardware, and bandwidth as well? The moment your annual AWS passes 500k it makes sense to shop around.