My theory on why the car hasn't been tied to anyone yet is that it was "borrowed" from a used car lot, auto auction, or car repair shop.
My dad and uncle used to be detailers for a used car lot and they were allowed to use vehicles from the lot that hadn't been put up for sale yet so recent trade-ins and cars that just came from the auction. They used dealer plates which are magnetic and can be removed in seconds. We didn't even own a car because my dad could reliably borrow a car from the lot even when we were going on family trips.
If someone was in a higher position (like a sales manager) and had access to the key cabinet, they could borrow the car, commit the crime, and return it before anyone even knew it was gone.
I hope that LE has looked into sales of this particular made and model but maybe they came up empty because the car wasn't sold but instead sent to auction.