I think the relative lack of fires in EVs speaks for itself. This gif speaks for the Model S.
I don't know what the Tesla differential looks like, or how it manages tire slip.
Regarding my Prius, I take the rough roads slow, but I'll scrape the frame from time to time. No big deal except occasionally I'll have to repair the plastic undertray. Back in when I used to offroad my Subaru Legacy, I'd use momentum all the time. Never had to fix a thing on that car for all 240,000 miles of life.