I believe that even next season is too early to count Pirlo out of the starting lineup due to age. What did you mean by next January? The upcoming one or the one after that? Because if you meant the upcoming one you're insane. I'm interpreting what you wrote as the one after, though. I still think he's gonna have alot to give in the coming years. Like I wrote in the Pirlo-thread, he doesn't have alot of pace, but then again, he has never required it. Class is permanent. All he really has to do is stay fit, and he can play for many years.
Just look at a player like Ryan Giggs, who actually IS pace-dependant. He could play until almost 40 and win PL's and CL's. Why can't Pirlo?