Same curiosity applies for 24 and 23.976.
My primary concern is loss of quality. I want to work exclusively in 30.000 frames per second; if I understand correctly, some software defaults to 29.97, and some recording devices use 30 implying 29.97, and some screen capture software use exactly 30 as it should be.
I'm just concerned with recording 30.000 1080p RGB video with my Canon 60D and editing it at 30.000 1080p RGB (not YCK or whatever) in Premiere Pro, so I'd like to understand how these standards work with each other, how they convert, and how they play back.
Are there dropped frames or interpolated frames? If I convert a video from 30 to 29.97 and back and forth many many many times, will video quality degrade? What codecs and file formats should I work in to ensure 1080p or UHD support at exactly 30fps or 60fps RGB?