There's a definition problem. You cannot live forever for the same reason you cannot count to infinity. You can merely have the potential to live forever.
So people are having a problem with the mental exericise. They try to think if they will have wanted to be alive for billions of years and then call that forever. It's not really the same thing.
I'd very much like to have the potential to live forever, and all that's required for that to occur is to have a continually reducing risk of death. Every time you perform an action that reduces your risk of death, you increase the probability that you'll never have to die.
The way I ask this is: if you want to be alive tomorrow, could you imagine wanting to live one more day (in 100 years) if your life was tolerable or improved from now?
All that's required to live forever is just not dying. It's actually that simple. The best way of not dying is to improve your odds of living.
(PS: immortal cyborg? Is that really the impression I give? I cannot imagine, fully, what changes are required to not die ... so ... whatever floats your boat!)