Even in today’s tech industry, people who are older than 40 or 50 are considered wise old men when they can get hired at all. But yes, we have extended adult lifespans, just not by 40 years which is the naive assumption many people make from the observation that life expectancy used to be 35. Also, I would expect that most of the extension in adult lifespan has less to do with old people having better medication than with broad declines in smoking and alcohol consumption. How long into your eighties and beyond you will live is largely determined by lifestyle decisions made in your teens, twenties, and thirties (though it is never too late to quit smoking!)