Watching Kawhi develop has been as much fun as playing your favorite video game and upgrading your character over time. In each case, there just doesn't seem to be anything stopping the adding of new skills.
It's hard to remember it now, but no one could have reasonably predicted Kawhi Leonard was going to one day become one of the league's best 10 players. He fell in the draft because he didn't have the ball-handling or shooting ability to be a full time wing or the strength and height to play power forward.