The point about say medicine first being used to help elderly patients' red blood cell production, which is then adopted albeit illicitly by younger people illustrates another interesting principle; by solving problems for those not healthy on one way or another, those solutions can be seen as enhancements for those without those initial conditions. But I wonder what the side effects are...

When people start discussing the possibility of replacing limbs with robotic ones, that leads to questions about the futuristic military soldier. It's quite scary that there is the possibility of future conflict promoting competition in technology as it always has; first are the ones that feel acceptable like robotic exo suits that help with carrying heavy loads, which isn't too different from say having a vehicle. But when technology fuses with biology, that's where things feel murky like robotic arms or mental implants that control human soldiers like robots... This feels a lot ickier.

(That said, if you've played the xcom series, the MEC troopers are super cool and invaluable for fighting the aliens... Haha... Even if they are basically human heads on robot bodies)

But in the more foreseeable future, it primarily seems like a way to further exacerbate inequality as this clearly won't apply to everyone anytime soon and then those with enhanced longevity, who are probably those with a lot of influence, theyll continue to fashion the world with the ideas they are used to even if the world needs fresh perspectives and leadership. This also, I think, bothers me. I really don't like the idea of many of today's leaders being leaders forever...