Don’t get too hung up on it. While it’s cool to be a great grandparent, a great grandparent has tons of grand kids, and a lot of them don’t really give that much of a shit about you at the end of the day unless you’re some kind of interesting person. No descendants will care about you as much as your immediate children. I love my grandparents, but barely see them or talk to them even knowing the time is short.

Think of the advantage of having kids later: Your kids get to be born into a deeper and better future, and may some day enter the 22nd century, lucid and able.