Forced immortality, yes. But even then it might not be so bad. I understand the whole point about lines blurring, but over time you would gain much more than you lose, and I'm sure eventually you'd find a way to combat the monotony or the possible madness.

These are not assumptions I'm willing to make. Essentially the problem is that we don't know what kind of quality of life machine immortality will offer. Even if it's eternal bliss, how do we know how we'll respond to that? What will happen to my sanity if my existence stretches on for a trillion years with still no end in sight? We can't predict how we'll respond one way or another.

If people could be turned to androids, that by no means signifies forced immortality... after all, it just means they won't die of old age or sickness. Memory wipes, short circuits and even good old grievous bodily harm can end a robot.

Unless part of the process of immortality involves regular backups, which means in the event of accidental damage or destruction of your old shell you get restored to a new one.

I know I've worried enough about death to know it would take me centuries to get bored with life. And during those centuries... I could benefit myself and the world a lot.

Sure, extra centuries sound nice. Millennia even sounds good. But will I be sane at the end of ten thousand years of unending existence? A hundred thousand? When you're talking about immortality, you're talking about time frames that far exceed what you're talking about here.