The reason I did this was to populate an Excel workbook that tracked where every part went, what it was for, and where it could be found on the drawing. Being in Excel it was easy to see that all parts were accounted for, where to find them in the drawing, and, see the flag notes that were related. That last bit is handy to make sure that locking compound or torque notes are applied all the places they should be and that each hardware stack had all the items they should have.
I thought of getting more detailed and checking to see that screws/nuts/washer sizes matched...
If you need QA or customer acceptance of a drawing package, showing that everything is accounted for is a big boost and worth the time spent doing so.
Finally, maintenance of the package is pretty easy. Even if a view moves to a new sheet, fill with the new sheet number and copy/paste the new zone.