One often misunderstood facts that I like to point out whenever this sort of thing is discussed is that the potential human biological lifespan has remained static throughout history. We haven't increased the human lifespan length at all. Some percentage of people always lived as long as they do today.
People often misunderstand Average Lifespan statistics and think that people only lived until their 30s not that long ago which is a complete misunderstanding of what those statistics mean. That was never the case. The average was 30's due primarily to high infant mortality, that does not equal most people dying in their 30s as that statistic is often misconstrued to mean.
Humans have always been able to potentially live up to their early 100s if fortunate and in good health, that is the ceiling of the biological lifespan limit for homo sapiens. What we have changed is we vastly decreased infant mortality, which really brings up the average, and via things like sanitation (indoor plumbing) and modern medicine reduced the number of diseases and illnesses that historically wiped out percentages of the population. Those two things account for over 80% of the bump in average lifespan increase. They didn't change how long people lived for, they increased the number of people that made it to older ages, hence bumping up the average.
The next largest bump was gender specific, we reduced the number of women dying in childbirth, and the number of men dying from heart related conditions (at least we allowed them to live through multiple events that would have previously been fatal). We have also extended the length people with other diseases such as cancers can live.
Hopefully I've been able to explain that important distinction and difference. I'm sick of otherwise intelligent people saying that we used to live into our 30s, that just isn't correct.
All this leads to huge increases in the average lifespan, I'm glad more people are making it further, but I'm really looking forward to the day that we can push the final marker/goal post back and increase the length of the potential lifespan of humans. That will truly be an monumentious advancement.
(of course all those sentiments don't factor in things like global population and other serious concerns, but those make for a much larger discussion less on topic to this one.)