The main reason why it dont move enough fast is founds. Many people developing new solutions doesnt take from this any $. And there is second part of community that take from open source and sell those solutions and finally making money on inventors works. There is a lot of people who wanted to work on 3d printers and started to work for companies. When the work started be commercial they dont publish newest movements. So we didint go to much in last 6 years. Everything works that same we had only bed autoleveling its a only one milestone in reprap community