In the `logNow` example, the date argument will be eager evaluated, not lazzy evaluated. Am I right? So what was supposed to be a real use case doesn't seem useful to me.
Or a function that return new date, but it'll make things complicated.
It's the function caller that's responsible for that parameter with partial application / currying / closure.
It doesn't matter if you develop both, but if you use a library you'll need partial application to define default parameter.