Another point is that there's a sub-linear relationship between mortality rates and life expectancy. Intuitively, it seems like a 10% increase in mortality shou

Another point is that there's a sub-linear relationship between mortality rates and life expectancy. Intuitively, it seems like a 10% increase in mortality should cut your life expectancy from 81 to 73. But in fact, it only cuts life expectancy by about 6 months. To meaningfully cut years off your life, you have to increase your mortality rate by hundreds of percent. E.g. smoking about triples all cause mortality. Going the other way, this is the real challenge with life extension. To increase life expectancy by a decade would require lowering mortality rates by more than an order of magnitude.