Milan Kovac, the head of Tesla's Optimus humanoid robot program, is reportedly leaving the company.Tesla CEO Elon Musk aims to have 'thousands' of Optimus robots in their factories by the end of the year and scale up production rapidly.Kovac, who has been at Tesla for nearly 10 years, played a significant role in leading the development of Optimus since 2022.Ashok Elluswamy, the vice president of Tesla's AI software division, is set to take over the Optimus project following Kovac's departure.