Generally when people are talking about extending human lifespan, they're talking about extending the active, healthy lifespan. Obviously, what we did until now

Generally when people are talking about extending human lifespan, they're talking about extending the active, healthy lifespan. Obviously, what we did until now with medical advances is prolong old age and delay the inevitable. If it's possible to slow aging, then being 80 doesn't mean anything per se, it's just a number if you're biologically like a 20 year old today.