... The other reason is financial. Despite the numbers which indicate FIRE-readiness, I really like the idea of putting off the distribution phase a bit longer and continuing to add to my 401(K), Keogh and IRA accounts. I fear this will sound greedy but really it’s more about being conservative and cautious. Maybe some of you understand..?
Looking at your numbers, I believe most posters here will agree with me that you do not have a financial obstacle to quit working. But if you need another reason to keep doing part-time work and don't mind doing it, there's nothing wrong with it.
I would like to tell this story. A few years ago, the doctor I usually saw was not part of the new ACA insurance plan that was solely available in my area, so I had to go to a new practice. It was run by two older doctors who were close to 70. I was just past 60 then, and I looked young for my age. Nobody would have thought that I already retired.
The doctor I saw was really interested in my life story, when seeing that I survived a potentially life-ending illness, and that I had been retired since the age of 56. He asked me what I was doing in my spare time (what spare time?), and what I did for fun (wandering around Europe for up to 2 months at a time, or RV trekking to Alaska or the Canadian Maritimes).
In my next visit, that doctor was not available, and I was seen by his partner. He asked me the same questions as the first doctor, and said that he had not retired because he was not sure how to spend his time. He was self-defending his still working and justifying although I never made the comparison. I tried to soothe him to say that if one enjoyed his work, then there was no reason to quit, and that if it were not for my past illness and the hassle at work, I could have continued as I also loved my work.
When I needed to see them next, I learned that both had retired and sold their practice! I would like to think that my story influenced their decision.
And then recently, I learned this story from my long-time friend since high school. He said his older brother who was a pharmacist developed a manic depression after retiring at the age of 70 and not having anything to do. It was bad enough for him to need clinical treatment.