There is something that struck me when reading your article.

But maybe let me be honest. Having a doppelganger looks tempting

It looks tempting for real, and it can be so good if I have total control of that clone, telling it what to do without it refusing but you made another point in your article, or more like a question

What if he can do exactly the things I do, speak like me, reason like I do, and have human feelings that I have? Then what exactly is my uniqueness again? What if he overpowers all my existence and turns into a better version of me, taking my roles, knowing how to earn money, and even having the best of the dreams and goals?

While I was reading the African article, she said she would like to have a clone of herself that thinks and has the same emotions as her, but let's not forget that emotion is something that can be developed newly. When you get a clone of yourself, after some time, trust me, you both won't have the same emotions again because you would have different experiences unless you want the clone to experience the same thing you do, which means going everywhere you go. Now imagine you fall in love with a lady and that same clone falls in love with her.

We all know how love and hate are two of the biggest emotions, followed by jealousy. Who knows what you would do to take away any competition from the road? Or even if your clone lets go, do you think you will forgive yourself for stealing your own girl?