Yes, it's a good thing for buying a very used car. You'd have to be a fucking idiot to buy one brand new and mildly stupid to buy a lightly used one.
It's not a good thing if you want to buy an EV that's still worth something with the intention of being able to sell it before it becomes a heavy heap of problems. Heavy depreciation is good when you're buying 10+ years old, not when you're buying 2-3 years old with warranty still intact. For that case you'd want moderate depreciation, where it's already lost some price, but you know it'll still be worth something in 5 years. Plus most people still need to get financing of some sort on a ~20-30k purchase. If it depreciates too quickly and something happens to your finances, you'll be underwater on that loan or lease while trying to get rid of it.
Meaning any EV under 10-15 years old is currently a really bad deal financially, meaning an early Tesla Model S is basically the smartest EV purchase unfortunately.