The digital revolution made the difference, in my estimation, upon reflection of your comment. Apollo rockets took off with a computer so powerless it is hard f

The digital revolution made the difference, in my estimation, upon reflection of your comment. Apollo rockets took off with a computer so powerless it is hard for us to fathom in comparison to the machines we're using to type these comments. The ubiquity of powerful computers I think was a prerequisite for your list: automation, solar panel, and reusable rocket technology. So to answer the implicit question: why now and not 1969? You can buy an M1 MacBook Pro for $1,000 instead of a $1T.