Tangential, but one of the concerns I have about these 'smart' cars is they have an expiration deadline.

There's an exceedingly common type of failure I have seen myself in industrial electronics and (has happened with Tesla at least once), that some module keeps a log of some kind in a nonvolatile flash, and this flash has a limited lifecycle, which the equipment reaches at some years into its life (or earlier, if the flash came from a bad batch, or more logging happens than planned).

At this point the board usually gets bricked and replacement is very hard due to cryptographic handshakes between components.