Elon Musk is an engineer. After designing and improving the first SpaceX rocket engine, the next generation rocket engine has 30% less parts. A 30% less chance of a part failure.
Musk has a motto: The best part is no part.
PS.....Re: water vapor as exhaust. The main ‘greenhouse gas’ is water vapor. If and when such a device is produced in large quantities, the control crazy, envirowackos will claim that water vapor is the newest Globull villain. Other wackos will claim we cannot ‘spare’ ANY of the Earth’s water for such a trivial thing as transportation.
BAN DIHYDROGEN MONOXIDE - THE INVISIBLE KILLER!
Dihydrogen monoxide is colorless, odorless, tasteless, and kills uncounted thousands of people every year. - https://www.dhmo.org/truth/Dihydrogen-Monoxide.html
-——The best part is no part.——
In his current Tesla production, 170 parts were reduced to 2 parts.
He has severely disrupted auto design and production