I agree that “natural” human lifespan has topped out near 120, the next step to extend human life will have to go farther that is naturally possible (basically, replacing organs with regenerated or mechanical parts, rebuilding DNA, Nanobots to fix problems at the microscopic level, etc). That should be good to get you to 200 (provided you can afford it). At the point some interesting problems arise in that your brain essentially runs out of “storage” capacity.
The length of the ‘telomeres’ at the ends of your DNA determine your time on earth..................assuming you don’t do something to hasten it................
“... your brain essentially runs out of “storage” capacity.”
Mine did a long time ago. Ask my missus.
I see lots of people age 90+ because my M-in-law is in a nursing home. She is 90. I certainly do not wish to look like anyone in that place who is over 90. ALL those 90+ look like death warmed over. They are alive, but what kind of quality of life is that? They can hardly walk, can’t eat much, eye sight is bad, hearing is bad, no sex of course, and no travel. I think I am going to say adios at 90. In the meanwhile living it up while the body is in great shape.
In 1993 at my Vietnamese language church there was a funeral that the old ladies all insisted that I must attend. it was for the “grandmother of grandmothers.” I didn’t know the significance of that epithet until I saw the picture on the coffin with her dates. 1880-1993. She was no more than 4’10” and 75 pounds. When Thuy came to America she was already 100 years old. This year a fellow in the parish celebrates his 102nd birthday. Het is still pretty healthy and says it is because he avoids doctors.