SciFi can be interesting, but the pursuit of immortality or even extensive longevity always seemed to me like a very very bad idea to me. I like living, I don’t like living enough to want to do it forever.

Myself, I always saw the point of the pursuit of immortality to not actually be immortality, but letting you choose when you're truly done with the world rather than dying of some arbitrary cause out of your control.

Some might decide they're done at 70 years, some at 700. The societal changes needed to make it work would be immense, but wresting control of your death date from luck and nature into your own hands seems a worthy enough goal to me.