User blog comment:IamJakuhoRaikoben/Chapter 500: Fire and Ice, Review./@comment-27281341-20160906085027/@comment-7418318-20160906161824

With Rave Master they gained one Rave stone after the other and revealed the mysteries of the past bit by bit all the time. Every arc is needed to arrive at the end, because each arc is one important part of the puzzle.

Can you really say the same for One Piece? Because up to the point where I gave up on OP it had a distant final goal, but that's it. There was no overarching story... just a series of completely independant adventures that the crew stumbled into on their way to the goal, rather than the adventures being part of the goal like in Rave.