Some years ago I read a novel by Richard K. Morgan called Altered Carbon. It's premise is that people's personalities could be digitally stored and downloaded into other bodies. Or, sometimes, artificial bodies (I have read similar stories in the past).
Now the intriguing thing about this is: how many people would give up their organic bodies, and all the ills it is heir to, to be downloaded into a perfect artificial body? No disease, no unnecessary pain, none of that.
I doubt this is going to happen anytime soon. But I wonder when the day will come when all diseases are cured. I suspect we would have been there already if so many people hadn't been killed in wars - which is hundreds of millions.
Exactly how far are we behind where we should have been? Five thousand years, maybe? That sounds about right.
The Greeks built the first analog computer - the Antikythera mechanism - in the first century AD. If not earlier. Europe didn't repeat this accomplishment until the 1400s.