Disclaimer: AWS Developer Advocate - Serverless

One could easily configure lots of things wrong in life that would end up wasting money! That said we find that many customers end up saving a lot by moving workloads from more traditional "serverfull" models to Lambda and serverless application patterns. We also see entire startups starting this way and getting to fairly massive scale without ever needing to manage a host anywhere. While not a silver bullet, the use-cases for Lambda are many and proven. More here: https://aws.amazon.com/lambda/resources/#Customer_Case_Studi...