but a used Model 3 doesn't! and that's the fake news here. These batteries last ages. https://www.youtube.com/watch?v=doAcNVuTnXU
Truth is not many want to risk buying a used electric car and the depreciation reflects that.
For newer cars it's hard to tell for sure since the tech has improved significantly in recent years. But even the earlier cars have done better than people expected.
A quick google turns up lots of sources you can read. Here are a few:
https://unitil.com/blog/electric-car-battery-life-fact-vs-fi...
https://blog.evbox.com/ev-battery-longevity
https://unitil.com/blog/electric-car-battery-life-fact-vs-fi...