If you understand how cars work, you should know that an electric cars will probably drive 1million miles. It has less moving parts than cars. Engines - 500parts, transmissions 2000+ parts. Tons of friction, heat, wear and tear. Electric cars are so much simpler and if anything will prove to be much more reliable than cars. If anything that's what those companies have to worry about. Why would anyone want to replace their car when they can just replace battery? i won't be surprised if this is the reason Tesla is almost treating it like a modern day product with software upgrades. I suspect in the future, they will have it where you can just replace the exterior panel to get a new car and have the interior easily swapable as well.