Not really. Having offspring & re-mixing genes in them, is one way how species (not individuals!) adapt to a changing environment.
Bacteria do that in ~hourly intervals, humans take decades, some plants can span millenia.
So you could say the 'update interval' is tuned to how fast-changing a species' environment is. A balance between energy 'wasted' on re-building individuals from scratch, vs wasting energy by having poorly adapted individuals.
So 'immortal humans' to me reads as: humans optimized for a caveman hunter-gatherer lifestyle, while living in Star Trek like tech-heavy surroundings.
If anything, humanity would be served by shorter lifecycles, until tech advances stabilize somehow (?). Okay a few individuals living way longer could be good. Eg. billionaire tech bros taking that spot? Please nooo!!!
We stopped using evolution for adaptation the moment we started using tools. Our brain size was the last "gift" from evolution. We have been on our own since then.
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