I'm still young ish but I have more interested memories than I imagined I would, more interesting memories than my old man has.

I'm not saying it would mean end of life

Two things

What allows increased life span things like telemore extensions, cellular repair also increase often cancer risks, essentially what often limits cellular repair, regeneration often limits cancer

We all have latent cancer but sometimes something us kills us first. Mice get cancer in such high rates in old age because essentially natural selection in the wild made it so most didn't live past a certain time, so cancer in old mouse age wasn't selected against, again with humans, extreme old age will mean certain cancers might show up at 130 that we wouldn't see without

That and current medical ethics is very much against human enhancement. And is stuck in disease treatment not going beyond what's normal or average rather than what is optimal.

So one thing I do is I make an effort to go through and sometimes sit and enjoy my memories.

I am not sure OP but I can say if you sit and close your eyes, you can very vividly do it without tech.

Unpopular opinion but not psychiatry or mental health professions

Maybe neuroscience for cognitive decline

But I think a huge side effect of increasing life and health spans will be cancer

Essentially almost anyone who doesn't get cancer essentially died before they would have