Tesla Inc. has ambitious plans to continue adding vehicles that upend the status quo and challenge legacy automakers, but it's running into some familiar problems: namely, an inability to deliver on CEO Elon Musk's production promises. Musk has said the ongoing global semiconductor shortage will be a factor in Tesla's ability to produce vehicles through the end of the year and has already delayed plans for the Cybertruck, the next-generation Roadster and a semitruck.