Apple may be interested because it can (with a war chest of over 250 billion), and it gives them instant access to all sorts of mobility-related technology and expertise, not because Tesla presents the way of the future. It simply doesn’t. Not in the way Steve Jobs would have considered important. What Elon Musk basically did, is swap the ‘old’ petrol (and diesel) engine for an electric motor and batteries, and build a complete cult around his cars. Those cars are pretty conventional, even styled conventionally, with still the suggestion that a big motor is housed under the hood, complete with token grille. Lame IMO.
What Apple should have aimed for, is bring a car-equivalent of its iPhone, just as sleek, efficient and versatile, with the suggestion of freedom of movement. If Apple manages to bring an Bang & Olufsen sort of MeToo SUV, then it will just be another company. The inherent low-energy density of batteries should only be used in lightweight vehicles. It’s the only way of preventing them from having to need 400 to 500 kg battery packs, which is more extra weight than Teslas will ever have passengers on board.