The problem with a GOAT debate or a better now than ever debate, is that rules change. No era is the same. You could argue that ball handling might be better now than in the 70s, but Jordan and Iverson were pretty damn good at handling the ball. Defense was much more physical when Jordan played.
40 years is 84-85 season at this point. From basketball-reference.com:
Most Valuable Player: Larry Bird (28.7/10.5/6.6)
Rookie of the Year: Michael Jordan (28.2/6.5/5.9)
PPG Leader: Bernard King (32.9)
RPG Leader: Moses Malone (13.1)
APG Leader: Isiah Thomas (13.9)
WS Leader: Larry Bird (15.7)
Other players of note:
Magic Johnson
Kareem Abdul-Jabbar
Hakeem Olajuwon
Dominique Wilkins
Charles Barkley
Who are the better skill players in the NBA today?