We are almost certainly going to be able to genetically engineer that into future people at some point, among a lot of other useful things. Dunno if we are going to manage to get gene therapy that can alter living humans so drastically before they die, though. And who knows when it will happen, just that it almost certainly will, unless we blow ourselves up.
> [It's] a cause of death.
This is not strictly true; aging is much like having AIDS -- it lets actual causes of death come in and kill you. Nobody ever died (directly) of AIDS, and nobody's ever died of old age either.
Thousand years later, first colonists in a different galaxy:
- Remember that dude from our childhood?
- Yeah, choosing to live a mere 70 years - so weird...
- Never mind, let's keep Terra-forming..."
[1] although very late, maybe on average it's a coming of age thing.
[2] being into computer and technology, I think we have a special relationship to fads, newness, communication and history that makes us (at least I) interested in others in weird ways. How people managed to solve problems or live in a different context, what was the same, what really changed for them as a human.