Yes, an equivalent to a 10 year old car would be a used one.

And you'll forgive me for taking Musks "claims" with a pinch of salt

I also own a 12 year old Lexus rx450h with 150k miles on the clock and the battery is imo starting to show it's age, and that's not even a plug in hybrid. I am expecting to have to replace the battery within the next 2 years