The striver’s curse
In almost every high-skill profession, decline sets in between a person’s late 30s and early 50s as the brain’s prefrontal cortex degrades ineffectiveness.
An additional rub is that the better people perform, the steeper the decline they likely face. And the more attached they are to success, the harder its loss hits.
Often, when decline kicks in, people like her are too addicted to success to make a change.