This was reportedly changed with the introduction of FreeTime and Lifetime Aspiration. Reportedly, a Sim who fulfills a Lifetime want in FreeTime achieves maxed-out platinum mood that decays very slowly. In practice, many Lifetime Wants, even those for FreeTime careers, still refer to the Sim receiving perma-platinum, and it appears that fulfilling Lifetime Wants still grants it, though there may be individual exceptions.