"Loaded" teams? Really? Loaded?
I don't think KG wins any of those championships if you replace Duncan with him; and I'm a huge KG fan who thinks the gap between Duncan/KG is smaller than the gap between, say, LeBron/Durant or MJ/Kobe.
I don't think there's ever been a season where I said that the Spurs have the most TALENT, but they've always had Duncan, and it's been enough.