Originally Posted by Newt_on_Swings
Ah I always thought the rounded sprocket pattern was a necessity because of the rate of speed the film passes though the camera/projector, so that they engage the teeth properly without tearing.
Just a supposition, but I figure the rounded edge shape helps keep the film centered on the sprocket better.
I do use a digital device in my photographic pursuits when necessary.
When someone rags on me for using film, I use a middle digit, upraised.