Teslas are different. Tesla buyers will ask "what features are on the car?" They won't be as interested in the year. They will look at mileage, body corrosion and damage (would be rust in steel cars but I think in aluminum it's called corrosion), and car features. If it has APv0 or APv1, and the customer wanted APv2, they'd down-cost that vehicle. If it was immaculate paint and low mileage, they'd up-cost that vehicle. Also, they'd look at the date of manufacture. 2013 was a really long year for Tesla. Certain safety retrofits and built-in features would have some value to used car buyers, but a lot of that is kind of hidden from all of us, so that's where there's kind of a little subterfuge that buyers would look at date of manufacture at a bit.
Also, let's say Tesla gets bought out or changes cultures, and becomes a company that doesn't make products for drivers any more, but for some other reason. That date of manufacture and anything after it would become a bad thing.
Let me think of something more current: an interested buyer wants >=APv1, and all wheel drive (Dual Motor), on a vehicle that looks nice. Suddenly, those two things matter a lot. With Tesla, that's not a model year thing. In cold climates, they'd want the heated steering wheel and dual motor, and maybe a heat absorbing color. In warm climates, they'd want remote AC and cool colors (not dark). A lot of people will want AP. Some wouldn't care. Some only want something that looks nice parked, so 40Kwh in the august of its life is a fine battery, whereas others will want to know if your 85 is in good condition.
Tesla doesn't work off of Model Year. Almost everyone knows that, and anyone who doesn't is just outdated. Part of this is up to the seller:
if your advertising remarks about your AP status, heated steering status, dual motor status, range on 80% SOC, miles, etc., and doesn't mention year, people won't look at year.
If you say "I have a 2013 Tesla for sale!!!!!!!!", buyers will know you're probably buying a Chevy.