My mother in Law was 94 before she started to slip.
My mom was 84 and she couldn’t follow the sun, let alone a conversation.
I’ve spent a lot of time around Octo’s. They are all different. It is honestly hard to generalize. There is so much that goes into the brain chemistry that you can make some assumptions about a cohort, but the individuals are all over the place.
True. My aunt worked until she reached 85. She did not quit because she was mentally impaired but because her eyesight was failing. Later, when she was 95, her biggest mental impairment was forgetting where she put her checkbook. As time passed, her mind didn't fail her but her body did. She suffered enough with physical ailments that she longed for death in her late 90s. She finally passed at 102.
On the other side, one of my employers kept working into his 80s as his job defined who he was. He would not quit despite a failing memory, impaired judgment and the habit of falling asleep even during meetings with clients (embarrassing as Ginsberg's sleeping during oral arguments and the State of the Union.)