No, you're quite right. FU money in 18 year is what will happen if nothing else changes in my life - and it's a better outcome than the unplanned alternative, which is chained to a job and broke in 18 years. But there are lots of other alternatives. I hope to get married and have a family, and my partner will probably contribute as much as I do or more to our shared savings. We might come up with some new goals together. But whenever I meet that person, I hope to bring more than debt to the relationship.