CQS is neat, but return values on imperative functions are really useful. For one thing, it allows you to compress your API, have an action that can be used sol

CQS is neat, but return values on imperative functions are really useful. For one thing, it allows you to compress your API, have an action that can be used solely for the side effect, or for the value of that expression. In addition, you can use it to determine success or failure, and other important information about the function.