John Martin Fischer: "Some would say that, even under these very optimistic assumptions, our lives would be totally different—and unpleasant or even unrecognizable as choiceworthy human lives. Various reasons for this curmudgeonly conclusion have been offered, and we’ll consider just a few. First, some have argued that life under such circumstances would be intolerably and relentlessly boring. The idea is that what keeps us from being bored are our “projects”, and eventually we would run out of projects in an indefinitely long (or even just a very long) life. I just don’t think this is true. That is, I don’t accept the conclusion that we would run out of projects in a very long (even an infinitely long life). Just consider, for starters, all of the scientific problems that remain to be solved. Focus, as a concrete starting point, on all of the diseases that plague human beings. The project of curing all the currently existing diseases would take a very, very long time. And, even assuming we can (given enough time), cure all existing diseases, by that time many new diseases will have popped up, offering new challenges. I just don’t think that it is obvious that we will ever get to the point where we will have cured all diseases (and palliated all human pain, suffering, and distress—both physical and mental). Simply having lots of time—even infinite time—doesn’t seem to imply that all of these challenges will successfully be met."