5 promises Elon Musk made about the Cybertruck that never happened

Elon Musk shows off a prototype Cybertruck in 2019. Frederic J. Brown/Getty Tesla canceled its range extender — and it's one of many Cybertruck promises the company hasn't delivered. The EV truck is also more expensive, with the cheapest version of the Cybertruck starting at $69,990. Other…