I love all this talk about Larry not being as athletic as today's players and whether he would be as good.
Many of today's stars are incredible athletes that are good basketball players. Larry was one of the best ever basketball players who was a good athlete.
Does anyone here realize just how great Larry's cardio-vascular conditioning was? There's a reason Larry was deadly late in games. It's because his cardio was so good that he wasn't as tired as some and was able to concentrate better than those that were tired. Lack of oxygen = lack of concentration. Proven scientific fact. Those 80 teams would run most current NBA teams off the floor.
Those Celtics and Lakers of those eras were record breaking marathoners not muscled out sprinters. Marathoners don't have huge bulk, but they have some of the best stamina of all athletes. That was basketball of the late 70's into the very early 90's.
Bird had once in a generation hand-eye coordination, unreal cardiovascular conditioning, an incredibly high pain threshold, and was a pure basketball playing talent. Today's players, the Josh Smiths, Tracy McGradys, Vince Carters, Chris Boshs, and even Kobe Bryants, are all athletes first and basketball players second. Bird was basketball player first and athlete second.
MJ, Bird, Magic, Russell, and others could not only play basketball better than you physically, they could play basketball better than you mentally as well.
All this needs to be taken into consideration when asking about Bird's or Magic's or Russell's or Cousy's transcendence between eras and it usually isn't.
Bird would dominate today. Of that, there is no doubt.