Very little research currently goes into attacking aging directly - as opposed to handling things that are in no small part downstream from aging, such as heart disease. A big reason for poor "longevity gains" is lack of trying.
Sleeping well, eating well and exercising does work. Science about this is well-established. So why arent we?
It would not raise the life expectancy to 100 years but it would considerably reduce the health burden on the economy.
We want solutions that can be scaled and rolled out broadly, and "basic healthy lifestyle" ain't it.
I mean, sure, it doesn't scale as well as a magic pill as a business. But is certainly is O(n) with the number of people involved.
- noise pollution
- lack of fitness
- stimulant use during the day
- inability to manage a clean, nice sleeping environment
- obesity and sleep apnea
- a partner who can't sleep
- heat or cold in your bedroom
- mental illness
So, just from that list, we see that we'd need to overhaul housing quality so everyone has quadruple glazing and an air-conditioner, stop them chugging coffee, get them help with their laundry, fix their fitness and cure their obesity (which are themselves caused by poor sleep), and get them into therapy.
That sounds hard! Also, we're already working on a lot of it, but it's generally difficult or impossible to fix all of those problems.