A pre-production prototype of the Joby Aviation S4 aircraft is displayed during the World Governments Summit in Dubai on February 12, 2024.RYAN LIM/AFP via Getty ImagesJapanese auto giant Toyota Motor is investing $500 million in Joby Aviation to support the U.S. electric air taxi company’s launch of commercial passenger services, which are slated to begin as soon as next year.Already Joby’s largest external shareholder, Toyota’s investment is on top of its $394 million capital injection in the company in 2 ...