The purchasable software package is called “Full Self-Driving Capability”. The word Capability is thrown in there to say that this will enable your car to have the capability to be full self-driving some day, but it isn’t right now. This is the important word that news orgs, like Jalopnik, tend to leave out, whether on purpose as a misdirection or not. This is the detailed text next to the button to add the option to your car: