It's littered, just hidden. Eg: if, if-let, when, when-let, unless etc. This makes it appear that the data is passed down in a monadic style, but it often isn't

It's littered, just hidden. Eg: if, if-let, when, when-let, unless etc. This makes it appear that the data is passed down in a monadic style, but it often isn't; *nil* is not an actionable value.