Inspection station in my state made comment to me that EVs are failing inspection for rusted brake components because of their heavy use of regen. Add to cost of ownership.
Below 5mph the brakes are used, but it doesn't seem to be enough. Compared to my ICE car they always look a lot worse, and after parked for a day when it's damp have surface rust.
As another comment says, it seems like a software change could fix it by using the physical brakes more. I believe the issue is they get wet, and then don't get hot enough to dry out before parking.
Are you suggesting some metal brake components have unusual rust because of disuse, where they aren't being used regularly enough for friction to "clean" their surfaces?
Otherwise I don't see how regenerative breaking could cause rust, since the braking force is supplied by electrical fields.
Yes, the brake disks, especially if you drive some place where they salt the roads during the winter. I had to change the rear disks on my hybrid after two years because they started to fall apart from rust, now I have learned to do some heavy braking at the end of trips to clean and dry the disks