Who knows what a human life span will be in the distant future.
Life extension tech added to the population tech tree would be nice
Wouldn't be hard to mod one in
Would make it a growth modifier (no change in actual birth rate, but fewer people dying of old age)
Still you could argue that life extension would have little to no effect in game terms, after all as life spans increase you might have people waiting longer to have children, or having fewer of them.
As for them putting in an actual date rather than a turn counter, I find it - annoying.
For a campaign I could see it, for sandbox it detracts from the game.
It is a minor thing, really, and one I can deal with, but it is, to me, one of the most annoying things about the game (when playing sandbox) i.e. most of the time.