So you know this by hearsay, and youtube clips.
Just because the Lakers dominated the 80's, not dismissing the Celtics and the Pistons, and the Bulls dominated the 90's, not dismissing the Rockets, Spurs & Lakers does not automatically give you the assumption that their conferences were weak. Not at all. Again, I say, there's a REASON why the majority of the greatest players of all time emerged between those two eras. We wouldn't even have NBA ball as a popular sport had it NOT been for the 80's and 90's. You don't know and unfortunately will NEVER know because you never experienced that period. Watching old clips doesn't give you that.