Can see the potential uses for prototyping, like if you fed in some concept art as the initial frame, but struggle to see the applications for game preservation

Can see the potential uses for prototyping, like if you fed in some concept art as the initial frame, but struggle to see the applications for game preservation. I feel the result would be more demanding to run than traditional emulation, slightly off in how it plays, and missing any content/interactions that wasn't covered in the training videos of the original game.