Thing with the 3 point shooting is...do we really think that if someone like Larry Bird played today he wouldn't be making hundreds of 3's per year and among the league leaders every year? He was as good of a shooter as any of these current guys, they just didn't attempt as many 3's back then. Doesn't mean they couldn't make them.
Byron Scott, Ainge, Cooper...these guys would be filling it up. Heck, look at Magic. The 3 was becoming a bigger part of the game towards the end of his career, and suddenly he's shooting and making a good amount of them. Do we really think he couldn't have done that in 1982, too? The game changed. The shot selection changed. The style of play changed. That doesn't mean guys couldn't shoot with any range back then.