Maybe I'm missing the context here, but why is the preceding post down voted? As far as I can see he's just reporting his subjective probability of some future events. If you disagree, you could supply links to evidence that might change his opinion, but I don't see why you'd down-vote his honest probability assessment. Maybe it was his rhetorical flourish: "that's of no use"?

My sense of the discussion here is that Bart119's attempting a tricky cost-benefit analysis of life extension and being a bit loose with his arguments. Perhaps he could start over with a defensible smaller argument: "present-day life extension, if extraordinarily successful, will create costs for society as a whole that may be a problem."