If this becomes more widespread, it will be a sad state of affairs. One basic hallmark of ownership absolutely should be the technical ability to personally repair your property or at least have it repaired by professionals entirely of your choosing. I really hope you're wrong and that a certain consumer demand ensures they keep existing. Auto makers locking you into their own dealerships with encrypted digital parts is the hardware equivalent of keeping all your digital "property" on a single giant platform instead of self hosting.