[quote=@gcold]
Technically, modern day human can live to 100+ given the right conditions. But why is the average lifespan 70 something? Because few have access to the perfectly optimal conditions.

Same with elves on Tamriel, they have the potential to live up to the Millennium. But with all the disasters, wars and diseases, few get to see that being realized. 

Drawing another parallel to real life; in that many seniors of advanced ages (80+) require some sort of assistance to get by daily. Things like pacemakers, wheelchairs and hearing aids are essential. The equivalent on Nirn is restoration, which most super-grandpas like Neloth utilize to stay healthy. Again, a bottleneck here. Not everyone have access to these.
[/quote]

Well yeah, Barenziah makes it to 430, at least.