Why wouldn't you know what your destructuring?

`({ id, option = true, name = 'unnamed' }) => // ...`

replaces

``` function(userObject) {

  const id = userObject.id;

  const option = userObject.option || true;

  const name = userObject.name || 'unnamed';

  // ...

} ```

I think this comparison speaks for itself. In pre-es6 code bases you TONS of code that looks like the second.