Harder maybe but it's clearly doable. We have a number of options now. And it's not like they've had to make them hyper-aerodynamic or anything. Just took a little more advanced battery tech.

Correct, but now consider how much time and money has been spent over the decades on making sure that "trucks can do truck stuff" for combustion vs. electric drives. "it's much harder" is true only in the context that thousands of years of engineering time have already been poured into diesel and gas trucks, and only a tiny fraction of that has yet been dedicated to electric. So it's not "much harder" it just "hasn't been funded yet at the level that the oil industry has provided combustion vehicles for nearly 100 years".