lol, that's the thing! I had pretty much reserved myself to thinking that he would at his very best be an Al Horford level player on offense, and it was going to be a long shot for him to get there. But he looks faaaar more comfortable with the ball in his hands than I expected to this early. His age is showing, but good grief the potential is just ridiculous.
The list of bigs who were positive impact offensive players before age 20 is pretty short:
AD averaged 13.5 points (56% true shooting) and 1.0 assists per game.
Dwight averaged 12.0 points (57% true shooting) and 0.9 assists per game.
KG averaged 10.4 points (52% true shooting) and 1.8 assists per game.
All others were still in college, hardly played, or were worthless offensive players. If JJ matches (or dare I say, surpasses) those numbers this year, he's on a special kind of trajectory.