Welcome Reboot. Our paths seem somewhat similar. Way back when I was 50, I was just FI (minimal pension was vested and running the numbers said ER was doable.) Still, I too had arrived at a point in my c@reer that I had always dreamed of. I stayed on until 58 when my j*b suddenly changed. At that point, I had the means to be FI AND to be able to many more things in ER than I would have been able to do at 50. In most ways, I am glad it worked out the way it did. As always, YMMV. Best of luck with your plan. Do keep in touch with the forum!
Ko'olau's Law -
Anything which can be used can be misused. Anything which can be misused will be.