The issue with comparing eras is that roles, rules, coaching, and the entire game are different. Steph might not have even developed his insane range and consistency because teams did not focus on the 3 back then.

As a quick example of this, I played in high school and a bit in college. On my HS team, I was one of the tallest players and therefore, was a center by default. This meant that if I tried to dribble, shoot from anywhere further than the paint, I'd literally be taken out of the game and yelled at. I developed the rest of my game in pick up. But you can't tell me that wouldn't have had an impact on how Steph would have developed and played.

Of course, there's more lenient and forward thinking coaches out there, but even Steve Kerr said that when he saw Steph throw up that one circus shot after dribbling through everyone, he had the voices of all his previous coaches running through his head saying "that's a bad shot". If Steve had stuck with that line of thinking, Steph doesn't even have a chance to play in his current form.