In short:
A live-stream broadcast of China’s military parade has captured Xi Jinping and Vladimir Putin discussing biotechnology’s potential to extend life.
An interpreter translating Mr Putin can be heard saying in Mandarin that human organ transplants could let “us live younger and younger, and perhaps even achieve immortality”.
Mr Xi responded that it may be possible for people to live to 150 years this century.
I wasn’t setting an upper limit. There is good evidence we are closing in on some of the causes of the symptoms of aging, as well as gaining evidence that dealing with the symptoms may reduce the effects of aging. If we only have those basic tools in the next 100 years, I could see lifespans being pushed to 150 to 200 for the typical person. If we can also deal with the lesser regenerative capability of the brain, I could see people living for centuries. As you said in other comments, there are a lot of interconnected pieces, and just fixing one or some of them won’t be as useful as fixing all of them, which really takes transplants off the table as a general solution, but also means we may see limited increases in life span rather than getting past the tipping point of life extension research outpacing the gain it gives you, eg., extending lifespans more than one year per year.
There also is one thing I believe is still unknown. Why 115ish seems to be the upper limit. The ones who make it that long are often in relatively good health. But they still die (usually in thier sleep) anyway. With no real reason why. So we need to figure that out to break through the current line.