Actually, Tesla's batteries don't degrade that much (10% average after 160,000 miles [0]). Turns out, with proper thermals and not charging/discharging fully vastly decreases their degradation according to other hacker news people on the topic [1].

[0]: https://www.google.com/amp/s/electrek.co/2018/04/14/tesla-ba...

[1]: https://news.ycombinator.com/item?id=15144315