I believe they'll enable it, actually, fairly soon. With this hardware at these prices, if they offered BootCamp again for Linux and Windows, they'd basically own the market almost overnight. Considering they have long-term contracts on RAM and SSDs and that they steep margin on their Mac hardware, there is hardly any reason to not make money off of those who actually wouldn't buy Mac hardware otherwise. Plus, there's a chance they'll also buy AirPods, mouse, keyboard, etc.