If you're running your application on 100 servers, that's potentially 3-4 entire machines you no longer have to pay EC2/S3/etc fees for, or it's more scaling he

If you're running your application on 100 servers, that's potentially 3-4 entire machines you no longer have to pay EC2/S3/etc fees for, or it's more scaling headroom because you've decreased load across your whole fleet by 3.6%. It's "small", sure, but in production performance issues are often "death by a thousand cuts" situations, so a 3.6% reduction is a big win compared to optimizations that are often in the 1% range.