Imagine for example that Dwight had signed his extension long ago, allowing the front office to not try to win a title by bringing in certain players (ie. Hedo and Vince), instead playing for when Deron's contract is up, keeping 1st round picks, etc.
I am not certain of exact salary cap issues, but you can see my point. Tbh, I feel that the Magic right now and the Cavs before, where pseudo-forced to put themselves in position because their super-stars were unwilling to commit. It puts pressure for teams to get results NOW, without a good base, which rarely works in sports with caps.
I think one of the secrets of the Spur's success, as can be seen by the fact that they don't win back to back, but every other year during their prime, was the knowledge that Tim Duncan was there and wouldn't have a cow. (Ie. He is mature about these things.) They could legit contend for a title (and win) and then next year be a 3-4 seed while they reset a bit and not have it be the end of the world. It lead to long term stability of their franchise.