Tesla gambles that introducing new models no longer matters

By Chris Kirkham (Reuters) -Tesla’s groundbreaking 2017 Model 3 electric sedan, followed by a taller Model Y variant, ushered in the era of mass-market electric cars, made Tesla the world’s most valuable automaker and CEO Elon Musk the world’s richest man. But years later, Tesla’s stalling car business remains almost entirely dependent on that one breakthrough – and it may continue to be for years to come. The automaker's only model since then, the Cybertruck, flopped. Tesla now has next to nothing in the product pipeline for human drivers as Musk refocuses the company on self-driving technology and humanoid robots. A new Roadster supercar, unveiled in 2017 as a prototype, has yet to arrive and would serve only a super-wealthy niche. The automaker last year killed a project to make a $25,0