Obviously it isn't really working well yet, so newer versions with better DNA are released and old ones get retired regularly. ;-) Perhaps we could have fewer such DNA "updates" if we didn't mess with our environment (= living conditions) so much that frequent adaptations are needed.
I'd really like to see a study that examines people's life expectancy when they move (very early) from a modern environment to one that resembles their parents' living conditions 10-20 years ago, the hypothesis being that their genes would have adapted to cope with those conditions and not with more recent changes, so they might live longer and healthier on average. Usually we do the opposite, many people move from rural to urban areas, so they need to adapt to more changes than those happening at an already fast pace in one area.
(apologies for half-serious unscientific techie ramblings)
I'd really like to see a study that examines people's life expectancy when they move (very early) from a modern environment to one that resembles their parents' living conditions 10-20 years ago, the hypothesis being that their genes would have adapted to cope with those conditions and not with more recent changes, so they might live longer and healthier on average. Usually we do the opposite, many people move from rural to urban areas, so they need to adapt to more changes than those happening at an already fast pace in one area.
(apologies for half-serious unscientific techie ramblings)