Board Thread:Questions and Answers/@comment-30966312-20180814013025/@comment-38952966-20191004151940

As I recall, the original plan was always that Star Platinum would be able to stop time, and The World would be able to do it as well because it was originally meant to have the abilities of all the Tarot card Stands. Araki realized this would make DIO unstoppable, so it was ultimately scaled back to just having the same ability as Star Platinum, probably because Araki had already planned most of the fight around stopping time.