It's quite astonishing how terrible 24 FPS really is, but as the GP mentioned it was "good enough" for the time. It's a scale, and costs and processing was prohibited that it was the point where most scenes, especially dramas and human interest type things, were served well by the format.

Action scenes are just brutal at 24FPS. Running, pans, and so on. Either it's a blurry mess at a 180 degree shutter, or it turns into a rapid slide show (like early in Saving Private Ryan).

This is as much about frame rate as it is about display technology.

24hz on an OLED with very quick pixels is a very different experience than 24hz on a CRT or 24hz on a film projector.