The problem is all those wonderfully tuned, reliable, and efficient mechanical parts require millions of lines of source code and some really intricate wiring to make them move. And you'll never have the documentation or the source code to keep it all going. So that means it'll probably be scrap long before it has reached EOL mechanically.
I am not a mechanic but modular systems are great. Transmission and engine. That's all I want in computers to be involved in.