The best use case I know of is avoiding the common Python & Ruby pitfall of "just stick everything in a dictionary and index it by key". Welp, forgot to update

The best use case I know of is avoiding the common Python & Ruby pitfall of "just stick everything in a dictionary and index it by key". Welp, forgot to update every instance of that string index (particularly if that name overlaps with anything else, including variable and function and class names... so, like, a lot of the time).