On the other hand...all of the medical advances up till now mean some of us (who live in the right place and have enough money) will live better, but up to now, we don't really live longer. People have lived into their 90s for centuries, but a microscopically tiny number even now live into, say, their late 100s. The oldest was 122. And there's nothing concrete on the horizon that says "if we solve this problem, we'll live to 125", much less 200 or 500. If we cured cancer and heart disease tomorrow, that wouldn't change.