I wonder if part of this settlement was because he actually cares about being the richest person in the world and she was kind enough to make sure he stays that

I wonder if part of this settlement was because he actually cares about being the richest person in the world and she was kind enough to make sure he stays that way? I think you already answered it. I think she's smart enough to know the value of what she has will be more certain if Jeff has control. And she's also smart enough to know that $35B is way more than she could ever spend/use/invest/whatever.