Well a few experimented with slightly more realism. Todd AO was a film format that ran at 30fps. 20th Century Fox shot Oklahoma in that format. I've seen it projected at 30fps and it certainly has one foot in the "soap opera effect" door.
The movie Brainstorm also experimented with using the HFR as part of the story telling. But being in the film days, it was difficult to project/distribute.
Avatar 2 is the first modern equivalent to Brainstorm, where the filmmaker opted to "turn a knob" to digitally change the frame rate in a variable fashion throughout the film, depending on what the content needed. (Not the final content appeared to be 48fps, but the apparent frame-rate within that container varies from 24 smoothly to 48fps.
The movie Brainstorm also experimented with using the HFR as part of the story telling. But being in the film days, it was difficult to project/distribute.
Avatar 2 is the first modern equivalent to Brainstorm, where the filmmaker opted to "turn a knob" to digitally change the frame rate in a variable fashion throughout the film, depending on what the content needed. (Not the final content appeared to be 48fps, but the apparent frame-rate within that container varies from 24 smoothly to 48fps.