I don't believe what the author is asking for exists. The answer to his question, in my opinion, is a definitive "No." Even his 286 was arguably full of compone

I don't believe what the author is asking for exists. The answer to his question, in my opinion, is a definitive "No." Even his 286 was arguably full of components which were probably backdoored in some manner. And even if your hardware and software stack is somehow fully private, having to work with the web as we all do, almost guarantees compromise. This is not to say our efforts at privacy are completely in vain, just that this perfect endpoint doesn't exist.