Unless I'm wrong, this is because use of our full potential would cause an absurd amount of damage. Something about muscles liquefying? The full potential is there for emergencies, rather than the everyday use you'd see in a cyborg. Your parts will probably have to be built to withstand that. Regenerating damage on our own is kind of cool, though. And when that doesn't work, there are medics. Cyborgs could probably replace broken parts much more easily, but it'd probably be too costly to fix the little bits of damage you'd accumulate in day to day life until they start to make a big difference. And a big technical error would probably kill you outright. Hmm... Are we at the point where we can store a person's personality and 'mind' digitally? Backups would probably be a good investment: Cyborg body breaks down, get a new one. If not, could I start researching it?