What impresses me is the Tesla motor parts can turn at 18000 rpm and not explode. A Dremel tool spins its head at ultrasonic frequency max (20K) but it is small and light. For the Tesla motor to spin at that speed is strong parts engineering, because 1) it doesn't explode 2) wear at that speed is high normally. I have to wonder how they lube it, unless they use magnetic non-contact bearings.

Another impressive thing is the robotic manufacturing that Musk set up - it is very efficient. Others use robots but he has polished it all.

What impresses me is the Tesla motor parts can turn at 18000 rpm and not explode. A Dremel tool spins its head at ultrasonic frequency max (20K) but it is small and light. For the Tesla motor to spin at that speed is strong parts engineering, because 1) it doesn't explode 2) wear at that speed is high normally. I have to wonder how they lube it, unless they use magnetic non-contact bearings.