If flexibility and plasticity of thinking are age-related, couldn't prevention of ageing maintain that?

I think it's inevitable that such a change would cause big social upheavals. I find it highly ironic that those people who call this out as a negative often also call out how people living longer are change averse.

> I enjoy life but it's important to my enjoyment that there is a terminus.

Can I ask why, genuinely?

The fact that I will likely die sometime in the next 50 years doesn't make the evening out I have planned any better or worse. The band I'm going to see are getting older, but I'm going to see them because they're coming to my town and it'll be enjoyable. My eventual death has no bearing on it at all as far as I can tell.