The moronic argument of the hour goes something like this: "So maybe Dom Brown will be great in a few years. But that doesn't matter, because the Phillies' window is closing! You're not going to have Rollins, Utley, Halladay, and friends in a few years. You're only going to have them for a short while longer. So you should trade Dom (and Jon Singleton, and Jarred Cosart, and Vance Worley) for whoever will give you the best chance to win RIGHT NOW."
It's true that the Phillies can't keep Rollins, Utley, Halladay, and friends around until, say, 2016. But do you know who the Phillies can keep around until 2016? Dom Brown, Jon Singleton, Jarred Cosart, and Vance Worley, that's who. And Brody Colvin, Antonio Bastardo, Sebastian Valle, and hopefully a whole host of other guys (they're not all going to make it, but some of them will). In contrast, do you know who they'll have around in 2016 if they trade all their youngsters now? Jack sh*t, that's what.
If you don't want the window to close, the most effective way to solve that problem is don't close the window! Make no mistake about it - nobody who's making the argument above is sincerely calling for trades to be made as a response to this supposed "window" problem. Rather, they're creating the "window" problem as a response to their desire to call for trades to be made. They want to believe the window's about to close, because that would then justify their childlike impulse to open their shiny new toys and gorge themselves on all their cookies right at this instant. And listening to their advice will only make the problem they profess to be so concerned about into a self-fulfilling prophecy.