Writes should be minimal yeah. But reads could be intense. My car has worn out two maps SD cards. One of them had a questionable chain of custody, but I went back to the almost certainly original card that came with the car, and it's starting to misbehave in the same ways, so I think it's only a matter of time. These cards are unwritable after factory initialization, so writes are definitely not a factor.
I understand that reads can technically cause read disturb, but isn't this normally handled by the controller? My intuition says that the writes caused by block rewrites should not significantly accelerate wear. I'd suspect more mundane issues such as bad solder, but would love to hear an expert take.
