Most people would consider the fact that Americans live a lot longer on average than they used to a wonderful development. Many would like to see that trend continue.
On the other hand, it cannot be denied that extended lifespans have put a strain on many of our important services for the elderly. Medical care for the elderly can be very expensive and that has increased the cost of Medicare.
The longer people live, the longer they collect Social Security and that safety net is under stress as a result.
From that perspective it might seem a good thing that it is unlikely humans will continue to see increasing lifespans in the future, according to a report in the Guardian "Human lifespan has hit its natural limit, research suggests."
It appears biological factors limit the human lifespan to somewhere around 115 years even when people are given the best possible healthcare. If this research holds up to scrutiny, it should assist with planning when it comes to paying for Medicare and Social Security.
Of course, there are some researchers who are looking into ways to overcome the biological obstacles and extend human life even longer. So far, they have not been successful.
Reference: Guardian (Oct. 5, 2016) "Human lifespan has hit its natural limit, research suggests."