(Interestingly, some of the world's dictators do seem to have an interest in the current state of the art in prolonging life. For example Xi and Putin chatted about organ replacement https://www.bbc.com/news/articles/cr70rvrd41ko)

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

Even smart people belive a lot of untrue things, and his domain of knowledge isn't likely to include much more biology than my GCSE grade C and a handfull of brilliant.org micro-lessons; it's quite possible, though I would not put specific odds on it, that he's seen e.g. the sudden change in the rate of progress in protein folding, where before it was ~ one PhD thesis per protein and then suddenly AlphaFold did all of them, and extrapolated from that to everything else like an over-enthusiastic PopSci reporter.

We're actually in a great place to reverse aging already with off the shelf stuff you can get from the grey market. We have countless interventions that show improvements in aging-related metrics in humans that show verified longevity benefits in animal models. That's about as good as you can hope for without waiting a lifetime to actually confirm the human actuarial benefit, which is inherently a losing strategy.