> old people need to make way for new generations

The main problem with extended lifespan will not be that some people will amass extreme wealth and power while living centuries, and they'll oppress the younger generations, who will not have a fair chance in life.

The much more likely problem will be that old people will not adjust to the new technologies. Lots of them will be victims to "pig butchering" schemes. Or they'll simply be illiterate in the new ways of life. If medicine makes tremendous progress, we might end up with a good chunk of our society being elderly, healthy, but socially unadjusted and estranged. Especially with more and more people being childless. Imagine someone who is 110 years old, with no living relatives, secluded in a nursing home, not knowing how to use the internet, or whatever the equivalent of that will be at that point in time.

These people deserve pity. But to they need to "make way for new generations"? That feels a bit eugenic to me.