Not to mention that all of your parts that can be cut off without making you stop being you, like eyes or limbs, might already best be viewed as squishy prosthetics instead of fundamental parts of your true being. Ari Heljakka has written about this stuff, unfortunately in Finnish. I wonder if his Model Zero book has something about it.
Death, long lives, uploading
Mark Rosenfelder (aka zompist, of language construction kit fame) writes about the advantages and drawbacks of mortality and its alternatives, in fiction and real life. Rosenfelder, as an author, clearly takes Fun Theory very seriously. After discussing the mental and physical decline that age usually entail, he assumes that the most difficult to surmount of these problems will be the loss of mental flexibility and tolerance of novelty. He then uses this obstacle to offer interesting fun-theoretic arguments against uploading and cryonics:
And how he addressed the issue in his own far-future conworld: