Comment by close04

> Wake up grandpa

Just imagine how many more grandpas and great grandpas will be around for you to shout this at.

The problem with the population isn't (yet? only?) the absolute number of individuals but the age distribution. Most societies rely on young people to support themselves and the old, and this only works if there's a good balance between the numbers of each. Living longer isn't guaranteed to offer a longer productive period. We might just end up with more old people in need of support and not necessarily more children. This is already a major problem today in most developed countries.

There are probably so many more factors to consider. Like the psychological impact of living substantially longer. Even things like that crappy boss who won't retire from another 60 years, the dictator who won't die for another hundred years, or any number of the many society destroying tech CEOs getting to entrench themselves for decades more.