Let's keep in mind that sometimes chemistry gets worse over time. Players get tired of each other, get into fights, etc. Shaq and Kobe. DiMaggio and Mantle. Jeter and A-Rod. The Beattles. Things break up over time. Only the fans really like the consistency of the identity of their favorite teams. Players maybe get to know each other better on the court and, yes, can learn to play together better, but it can work the opposite way sometimes, too, when a player decides he needs to be a bigger star. Anyone remember how Charles Oakley got traded from the Bulls? He was complaining that there were no offensive plays drawn up for him to specifically get the ball. (Um, Charles, you have MJ and Scottie who can score all night long. Just keep having those 20-rebound games and we'll win...) Trading Oakley got the Bulls Bill Cartwright and a draft pick (Will Perdue), and actually improved team chemistry, leading the first Bulls threepeat. In short, chemistry is not a given, and can't really be woven into team performance in a basketball sim.
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