I'm not a fan of traits in the Sims 4. Asmara's brilliant video essay, "So...What Happened to The Sims 4? | Part Two: The Downfall," with 216,000+ views on YouTube eloquently summarizes the difference between Sims 4 and Sims 3 traits. I would also add that true personality needs both sliders for diametric attributes (active/lazy, shy/outgoing, etc.) for core personality that determines AI and animations used AND traits on top for additional depth. The Sims really needs both.
Video Link: https://youtu.be/aSyeb5RnWXg?t=505
