Ah yes, my favourite philosophical dilemma, The Organs of Theseus, and whether or not a sufficiently organ-replaced person is absolved of their previous actions by virtue of not necessarily being the same person.

As a more serious point related to this though, I was under the impression that organ replacement didn't address issues with telomere length?

Yea, but if you goal is extending life then investing in science is probably a better bet than GPU:s