I've given a lot of thought to this over the last few years, in considering whether to purchase and garage a new car like, say, the Dodge Challenger or something that might be saved for the future, but I keep running into the problems associated with maintaining the car and all of its support systems. I *can* work on my 1964.5 Mustang, or my 1965 GTO, because they're basic and simple to work on. But I can't imagine collecting all the tools and spare ECM, BCM, etc. modules so that you have them ready in 35 or 50 years. Maybe you'll be able to buy emulation boards or something, but I am having a hard time seeing the ability to keep cars (to stay on topic, including the Model S) for more than an immediate useful life of 10-15 years.