At my previous job in the power industry we had to clean up our shared drive and move all the CAD files of one type into a certain new folder, and the CAD files of the newer type into another, and PDF outputs in another, GIS exports in another, etc. Three people were dragging-and-dropping by hand for hours until I had some free time and made a Python script in 10 minutes to do this all. Got a few free drinks that day.