3.1 - I agree with you. Can you think of any ways which might be attempted anyway?
3.3 - Perhaps you should elaborate on that more: How does the game really change when objects are represented by data?
2.1 - But how do we make the motors? People are trying different things....
2.2 - Interesting interpretations, but I think Bowyer is also trying to say that you can 'own your own little factory' and thus have some means to produce goods without being rich in the first place.
2.3 - What about other apps for the robot? Extrusion is just one app.