These infotainment modules do have DVD updates available, although it's unclear what code the DVDs can update (they can certainly provide a new version of the m

These infotainment modules do have DVD updates available, although it's unclear what code the DVDs can update (they can certainly provide a new version of the mapping application so it's evident they can replace code as well as data, but I don't know the system enough to know if they could update other functionalities). It's also unclear if the issue is too systemic to be solved by updating a single module. But, generally speaking, infotainment is already much more user-update friendly than you suggest - many infotainment modules will take (hopefully signed) updates over DVD, SD, or USB.