I think that auto manufacturers are desperate to prove that an electric car isn't a little wimpy thing. Tesla proved that it can be a great sporty car and family SUV. Now they all want to win over the demographic of people who want a heavy duty truck, and prove to them that they don't need a heavy noisy stinky diesel to do it.
A lot of that demographic associate that noise, vibration, and smell with power, and think that electric vehicles can't provide that same performance and feeling of handling. A lot of them feel that electric drive will only work efficiently for smaller vehicles, or that electric implies lightweight or small or otherwise not heavy duty.
Of course manufacturers want to prove them wrong, and try to get all demographics interested in electric vehicles. Electric trucks would be great for utility companies.
