To add to this a bit, Jordan is the greatest ever because he did many, many parts of the game well. He was an excellent defender and underrated passer, in addition to being a great scorer. Durant is a better shooter and scorer, but he is definitely way behind Jordan when it comes to the other parts of playing basketball. Put another way, I don't think many people would go out of their way to praise Durant's defense or ability to create for others (though he did a good job of it today).