One of the major advancements of mankind was precisely being able to manufacture goods at a minimal marginal cost. Set up a billion dollar stamping machine and now you can produce widgets for a marginal cost of a few cents.
Compare that to centuries past where manufacturing goods of any kind- metal, clothing, or food took enormous amounts of resources compared to today and therefore goods were either too expensive to purchase, or had to be shared. Ironically, computers are probably the single best example of this. Previously they were complex and expensive to make, so the fortunate few who had access to one had to share it. Nowadays you can go to Best Buy and buy your own for a few hundred bucks. That is a huge leap in progress. Why would you want to move the other way?