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Edit: We actually don't want people to develop something "too good". There are some things in the past century that have been "too good". Plastics are too good. So are nuclear weapons. Completely powerful AIs and machines that can displace jobs of millions of people are too good. If there's an AI tomorrow that can replace every single physical job out there, what do you think will happen? Riot and chaos in the street after about 1-2 years.
Edit2: People will always go back to "we will just create different jobs". But do you really think that everyone is capable of skilled job? Remember, no physical jobs anymore.