For those (like me) who are committed to buying a Model 3 (not leasing), could the Model 3 be the last car you actually ever (need to) buy? Consider a few different factors: Provided it's as well built as we expect it to be (early fit and finish issues excepted), the electric drivetrain should outlast virtually any ICE-based drivetrains out there. Simplicity should = durability, but this will remain to be seen and perhaps the most important determining factor in this argument. Future battery replacement options. Considering that battery prices will continue to drop and capacity per cubic measurement will increase, we should expect that a battery pack replacement may become an affordable option in a few years should the original wear out or a newer pack provide extensively more range at a reasonable replacement cost. This could significantly extend the life expectancy and utility of the car (given point 1 holds true). The expected autonomous driving hardware is truly level-4 (fully autonomous) capable and software updates and fleet learning allow it to keep pace with the industry and regulations so that it can (perhaps eventually) truly serve long-term as a single car solution for an entire family for years to come. Finally, once the car is ready for retirement as a Powerwall battery and recyclables, you're either nearly dead yourself, or the whole transportation ecosystem has shifted irreversibly to "sustainable transport as a service" to such a degree that personal auto-ownership becomes an economic (and perhaps social) liability. In other words, it's easier and much cheaper to autonomously Uber/Lyft where the service nearly predicts your needs and the minimal time-inconvenience factor is a small trade-off for significantly decreased transportation budget. You can still get your vroom-vroom jollies by renting a sporty Tesla for an extended weekend with your savings. Possible arguments or events against: There will always be new tech and performance improvements that us gear- and gadget-heads will be hard-pressed not to trade-in or upgrade well before the car ends its useful life. You live in a rural or less congested area where car ownership will still make economic sense where autonomous transport services are less ubiquitous and convenient. You simply can't bear the thought of not having your own set of wheels to escape from a localized or generalized apocalypse, and waiting for an autonomous Uber in such an event fills you with dread. Some non-autonomous non-intelligent human driving Luddite t-bones your Model 3 in year 4 of ownership, necessitating a replacement before it's expected life should have ended. Of course you all survive unscathed because Tesla, and only another newly appointed Model 3 (or Y or ?) will do. You sell it to your college graduate son or daughter in year 10 of ownership and joyfully build out a new one. The world fails to heed the warnings and global warming requires you to trade in your electric self-driving Tesla for an electric self-driving boat (Model B?). How long do you expect to own your Model 3? Once that period is over, what potential technological, economic or social changes might cause you to forgo car ownership?