Well, I take this as a challenge. Both the "dying" thing (I'm young enough I suspect we will reach Longevity Escape Velocity before I'm old enough it wouldn't help me - and if such technology were to be hoarded, I'd advocate actively leaking any such information and enabling mass production nya), and the "doing something positive to change the world" thing.

So I wouldn't say it makes me sad. Instead it makes me determined and extremely stubborn (I also enjoy myself, though - not here constantly obsessing over death even if I consider it highly unethical and a major violation of morphological autonomy that must be resisted by any means necessary).