Human bodies seem to pack up with age regardless of how much you spend on healthcare.
I suspect major change may come more from a merging with AI scenario rather than better healthcare.
https://www.newyorker.com/magazine/2020/02/17/was-jeanne-cal...
Despite all the good reasoning about it being impossible to live that long, what does it for me is that people in her town, where she was well known, would have had to have not noticed Jeanne die and her daughter take her place. Including her doctor.
Not saying she definitely isn't a fraud, but the evidence against her is more hypothetical and the evidence for her is more solid.
It might have been fraud for 15 minutes of local fame. This wasn't national or international news and nobody had any interest in a book of records. But it seemed real to me.