They are gone. I mean, hell, Kamara almost went this year with a limited amount of touches compared to other backs. Unfortunately, it's now more of a surprise if a high-caliber junior player stays in school instead of leaving for the draft. It's just the nature of the sport. Most want to leave and get paid before risking injury. Finishing out schooling or having another shot at a national title are secondary to the NFL.
Now, I fully believe players these days still want to win a title, don't get me wrong. But if the NFL is placed in front of you, regardless of how good your chances are of making the championship game the following year, 90% of the time he will choose the money.