Serverless is easier to say than "load controlled ephemeral server management." Which is the real point. As my load increases the number of allocated resources, like servers, increases, and as it decreases so do the allocations and costs.

This is great if you are willing to completely change your client-server code to work efficiently in this environment. It is a strain over a standard design and you should only be using it when you truly need what "serverless" provides.