Rivian needs a massive transformation to eclipse Tesla, but stranger things have happened.Since its initial public offering (IPO), Rivian (RIVN 6.10%) has become one of the most prominent names in the electric vehicle industry (EV). With its sleek lineup of electric pickups and SUVs, many investors likely hoped that Rivian would follow a similar trajectory to the champion of EVs, Tesla (TSLA -1.11%).Although both stocks are currently struggling amid a waning EV market in the U.S., Rivian's stock has done no ...