I will hold me hand up to all of those except number 9 :-)
And while I am one - I don't actually own an anorack :-)

That said there are more and more conductive filaments around and 3d printed motors are rapdily becoming a reality.
Add to that carbon fibre filaments and thoeretically in a few years you could conceivably print every part of a 3d printer, except maybe the hotend.