I’m not sure if you’re going to notice any difference between 23.97 and 24.

That’s a good question and could vary from person to person. But the question is really a “purist” one: should that step be done (if there are no drawbacks) to get as close to the original experience as possible? If changing the actual files would create problems (and I bet it very well might), should someone, in their home theater, change the playback speed on these movies by 1.001 times, or would that not be technically the right thing to do?