Mikan, Chamberlain, Russell, Abdul-Jabbar, Bird, Johnson, Jordan. What do those generational players have in common? They came in wave of one, followed by two ad repetitam. Just look :
50' : Mikan
60' : Chamberlain&Russell
70' : Abdul-Jabbar
80' : Bird&Johnson
90' : Jordan
This is a rather funny coincidence. And I am not able to explain why such a things happened that way. But what seemed like a rule of sort has been destroyed by Jordan who made the NBA the superbrand it is today.
How so? There has been 4 generational player since Jordan. Three of them are even still playing today. Who are they? None other than Bryant, Duncan, James and O'Neal.
And this is why Jordan is the biggest superstar the sports world has ever seen.
Honestly, what's the point you're trying to make? That there have been more generational players than ever before and this is due to Jordan?
First of all, so what if 3 of these 4 guys play today and the 4th one retired recently? The 2010's do not belong to Shaq and Duncan by a long shot and hardly anyone would claim that the 2000's belonged to LeBron, either. So, in general, each era still belonged to no more than a couple of players. Wilt also played in the 70's, Kareem and Jordan also played in the 80's, Magic and Bird also played in the 90's. Second, you forgot Dr.J for the 70's - not as dominant in the NBA as Kareem, but very highly impactful. Third, I see no list of "all sports" or even "all leagues" here, just the NBA.