I agree that neural upgrades are inevitably coming, unless we don't get (self)destroyed in the meantime. It's natural for us (non-upgraded) humans to feel a little fear and distrust towards something drastically new that pokes into the core of what we are.

However, once this process does begin, I believe that all who do get the upgrade done will very shortly afterwards feel like that is something completely normal and necessary for a normal life. I'm more afraid of the extreme social divisions that this could make - if the upgrades would be done in a commercial way, the richest people/countries would get the best upgrades first, while the poorest would get no upgrades at all. That would practically divide us into super-humans and ordinary humans - something like the Nazis claimed, just true.