The Spurs and Celtics are two of the oldest teams in the league, right?
Wrong. Well, half-wrong. The Spurs are actually a relatively young team, outside of their core. That's how they've been able to extend their window of relevancy well beyond what anybody has expected -- they've acquired and developed young players.
Can you name any young players the Celtics have acquired and developed into rotation contributors since the Big 3 era started? The only young guys on the team now contributing are Rondo and Bass. Rondo was here prior to the Big 3, and Bass was acquired by trading Glen Davis, a player acquired at the same time as Garnett and Ray Allen.
If not for the unfortunate situation with Jeff Green, we could point to him, but even there it's a case of trading one young asset developed since before the Big 3 era for another young asset.
The best organizations that stay relevant year after year do so because they can spend, bring in free agents, or consistently acquire, develop, and stockpile young talent. The Celtics can spend. They can bring in free agents as long as the team is relevant, but not big name ones, and they haven't been able to do the third thing.
That, as much as any thing else, is why the Celtics are in serious decline this season while the Spurs, even without Manu Ginobili, are still hanging with the big boys. Huge credit to the Spurs organization for being great at scouting and acquiring good young guys, and to Greg Popovich -- who I think is the best coach in the league -- for managing his players minutes in order to win games and give time to young guys at the same time.
By contrast, Doc hardly ever plays young players, especially rookies, and Danny has whiffed pretty badly on almost all the picks he's made during the Big 3 era.