It would be interesting to revisit this experiment. There was recent news of the purchase of a large area of land on the outskirts of the SF Bay Area to build a "new kind of city", but the info on it is sparse: https://www.sfchronicle.com/bayarea/article/solano-fairfield...
The OP touches on important details to consider (the socialistic ones) -- who owns what and how do you make it so that everyone can thrive.