Ok, here is the scenario.
I was reading about some breakthroughs in medical tech, mainly around the treatment of heart disease. But a few others.
Lets say in 2030 following a bunch of significant break through discoveries, expectancy for those that can afford it goes from currently ~85 to ~150. Initially only the super rich can afford it, but it doesn’t take long for it to become an order of magnitude cheaper.
By 2050 the original tech (which is mostly out dated), is the same cost as a nice new car ~$50k in today’s money, the cutting edge stuff is still 1000x the cost but has a much more significant effect, think at least another 300 years.
The same pattern holds, by 2070 the the original tech is $500, the 300 year tech is $50k and effective immortality (medical) is now available in the market for $50M.
What would the ramifications be on society?
Another consequence that I can see as quite plausible, is that mental health would be the bulk of medical care. Once we can relatively easily solve most physical issues. Mental issues just become more and more significant.