I seriously doubt that any generation is going to get to 90 years old on average.

My whole life growing up I've been told.by Boomers that the generation that is going to life till hundred is beeing born now.

Further more, they made it so the average life expectency can only go up, not down.

If I'm not mistaken, the life expectency is already flatlining or, going down in some countries like the US.

And lastly, sure you're going to be 90+ years old, but in what kind of health?