I'll be very interested to see how Teslas hold up after 10+ years. I own a 15 year old Audi that I drive maybe once a week. Every time I start it up, something new has failed. It could be another broken sensor, a worn rubber hose, a broken plastic clip, a short in the electronics causing a parasitic power drain, etc.

Part of it is the age, but part of it is that gas cars are designed to be driven. Letting them sit for any period of time will cause headaches. Electric cars should, in theory, be better in that regard as long as you leave them plugged in.