The Model S actually seems fairly future-proof. I don't see battery tech getting much better in the next 5 years, and even if it does, it shouldn't be too difficult to replace the battery, controller, etc. with new technology in that timeframe. If they can move the industry away from "My 2006 Audi is still a mechanically nice car, but the nav system is horribly dated, so I'd consider replacing the whole car to get a better nav system in a few years", to one where you can more readily upgrade components (vs. just replace with identical parts, or go into the aftermarket world which only really exists for high volume models), that would be a big improvement.
Especially if the battery pack needs replacing after 8-10 years, it seems like it would be worth upgrading it at 6+ years with a 30% better-than-new pack, assuming technology has improved by then.
Agreed - the Model S looks like the first Macbook/Pro unibody from 2008. What would later become an iconic style, and that model is still supported through OS upgrades 4 years later. Still resells for ~40% of original price after all this time.
A wise investment considering the alternative products. A 43% resale value buyback isn't too shabby, but my guess is the model S would be worth more than that in 5 years.
Especially if the battery pack needs replacing after 8-10 years, it seems like it would be worth upgrading it at 6+ years with a 30% better-than-new pack, assuming technology has improved by then.