It always annoys me when they go for 60fps no matter the source which leads to unnatural motion because of the uneven frame pacing and the AI trying to correct that. It would've been better if they went for an initial quadruple frame, so 18x4 to get 72fps then divide that by 3 to get 24fps, that way the AI frames would be paced properly leading to a more natural interpretation of the source but then dropping frames to 24fps will allow it to then blend the frames to a more pleasing look.