Choosing between if and a modifier

A little bit of bikeshedding: In Ruby, even outside of guard clauses, I sometimes use modifiers to make the code easier to read out loud. A mental rule that I use to choose when to use a full `if` versus a modifier is taking into consideration if the condition has a side effect:

In this case I would choose the explicit `if` because the `post.save` has some important information when reading this code, while `return Success(post) if post.save` focuses on what is returned when skimming the code.