Admittedly, it's probably more "neat-o!" than practical. (Though it's just useful enough for me to drop into my bag-o-tricks module for general use.) It probably only pulls its weight when you have multiple sets of default arguments and/or multiple different functions you want to decorate.
There might be a few useful variations, too. For example, might want to make a bunch of default arguments at the *end* of your list (such as for adding formats to cells using Spreadsheet::WriteExcel.
When your only tool is a hammer, all problems look like your thumb.
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