Reminds me a bit of Diaspora by Greg Egan. I recommend it to you! Post-singularity “people” in the book start to develop interesting ways to distinguish between

Reminds me a bit of Diaspora by Greg Egan. I recommend it to you! Post-singularity “people” in the book start to develop interesting ways to distinguish between themselves and past versions. Since they’re immortal and infinitely copyable, their sense of self is naturally quite different from our corporeal on one. You might be into it!