The world's richest person could find himself much, much richer if he achieves the board's proposed long-term goals.It hasn't been the best year for Tesla (TSLA 0.15%) so far, with the stock down over 8% through Sept. 8 (the worst-performing of the "Magnificent Seven" stocks). Part of this has to do with the company's lackluster business performance lately, but much also has to do with its CEO, Elon Musk.Many investors had voiced their displeasure regarding Musk's divided attention, especially during his st ...