A couple years ago I learned something simple and profound about analytics in general: new information is better than old information. When projecting a player to the NBA from college, your data set is limited; this is why busts happen. When a player gets to the NBA (or whichever the "big show" is) you learn a lot more about their abilities pretty quickly. After a year of that player being in the league, you have a much clearer picture of who that player will become. But people hang onto their old presumptions, which is why people were convinced that they should keep guys like Bismack Biyombo or Jan Vesely around much longer than they probably should've.