It seems that Tesla's battery lasts the test of time, and arguably is the most durable part of the car. Most of the "reliability" issues, are mostly around everything except the battery, and are the kinds of issues that will get worse with them as the car ages (any car). Wouldn't it be hella nice if, - You could buy the shell of the car independent of the battery? - And you could buy the battery independent of the shell? So, - Hey I got in a major accident, just buy a new shell. - Hey I want autopilot, trade in your shell. - Hey I want to get the latest body style and some fancy new features, okay trade in the shell. - Third parties customizing the shell, while giving you a loaner shell. - People trading shells on craigslist. - Meh I'm bored of Tesla (should this impossibility ever occur), I'll sell the shell, and keep the battery for powerwall. - etc.