You are listing things that had great marginal improvements but giving people knowledge of the topic doesn't give someone even close to the ability to do those

You are listing things that had great marginal improvements but giving people knowledge of the topic doesn't give someone even close to the ability to do those things. Its a precursor sure but if someone doesn't have a great deal of scrap aluminum and equipment you aren't going to start producing ingots. Ok probably there is someone bootstrapping just that on youtube but youtube is a hard paywall so I'm not sure who gets a point on that one. The thing that is discouraging to me is that the young buck who can bootstrap something based on fundamentals is going to get outgunned everytime by someone who is better positioned.