Legacy manufacturers are wary about impending challenges in the electric car marketplace, but EV-specific startups like Rivian and Tesla are holding on to buyers.Tesla managed to deliver around 1.8 million units to customers globally last year, earning the California-based manufacturer the top spot on the BEV sales podium.However, with over 3 million BEV and PHEV models sold in 2023, Chinese automaker Build Your Dreams (BYD) was the biggest electrified-vehicle seller of 2023. Mainstream manufacturers have been sounding the alarm about electric-vehicle sales for the past few months, prompting production scale-backs…