What Do You Think About Life Extension?

There's two common objections that i hear to radical life extension, which i'm sure you've heard as well. One is that if people start living to be hundreds of years old, then the earth will be overpopulatedand that's bad. The second is related: If people start live to be hundreds ofyears old, the pace of change in society will slow down. So what doyou think about those two objections? Yess i think there is saying of different levels at which you can respond to this.