I don't personally feel like I want to live forever, but I also foresee very few situations where I would want to take action to cease living. So while there may be times where being dead looks more attractive than staying alive (boredom, stress, dismay, ...) I can see it just never getting to the point where a person kills themselves rather than face it anymore.

At the ripe old age of 54 (i.e., not really very old), I can also already observe that large sections of my already-experienced life have drifted out of my memory. There's less concern for the boredom of endlessly repeated experiences when it seems pretty certain that only bits of those events hang around long-term.