[mooreds]

So, the arguments I'd give against serverless (and this is dynamic serverless functions like lambda, etc, not serverless PAAS offerings like RDS or S3):

* they tie you to a certain cloud provider (though tooling like the serverless framework can help)

* they force you into the microservices model (and sometimes you should just start with a monolith until you understand the problem space

* they aren't good for running existing applications that are expecting more traditional execution environments

* still rapidly evolving which means that you may run into "bleeding edge" issues