According to The Information (behind paywall):

RISC-V, which is anchored by a nonprofit foundation, is gaining popularity among companies frustrated by the limitations and high costs of current chip designs such as those offered by Arm. Tesla recently joined the RISC-V Foundation, and also is considering RISC-V, which is free to use, for its new chip efforts, said a person familiar with the matter.

More about the RISC-V open source technology:

More than 80 tech companies including Google, Qualcomm and Samsung have joined together to develop a new open-source chip design that offers a much cheaper way to build chips for new technologies like autonomous vehicles. If the effort succeeds, it could seriously undercut SoftBank-owned Arm Holdings, which has been trying to extend its dominance in smartphone chips into new areas.

Tesla ranked #5 in LinkedIn’s list of companies where professionals most want to work. Only four companies ranked higher: Amazon (#1), Google (#2), Facebook (#3), and Salesforce (#4).

Tesla doesn’t make small bets, one reason it attracted 500,000 job applicants in 2017. Last year, the company built the world’s biggest battery, while CEO Elon Musk announced plans for electric semis and the world’s fastest production car. Its challenge now is ramping up production of its mass-market Model 3 sedan. Such ambitions require an ever-growing team, from scientists to roofers. Tesla’s known for quick decision-making: Engineers can ship code “without eight layers of approval,” one former employee told LinkedIn. Global headcount: 37,000