To me there is nothing so stupid as digital film grain. Artificial grain added after the cleaning process of an old movie or for just looks.

The lowry Bond and Indiana Jones removed all the fine grain as well as the dirt so they put digital film grain over the entire image, makes me want to throw the dvd's in the trash

As for star wars their is a reason Lucas wanted to remove all the grain so that the films would better match the new cgi and the prequels.

A lot of the removing of grain from films is because people want a pristine clean 21st century looking image that looks like it would have been shot on HD Video.