Trains travel on semi level grades -not steep. Trucks on the other hand do, even if only counting interstates. Having a large tonnage truck going up hill lose power would not be fun. Maybe they can make them more reliable than MUNIs implementation.

On the flip side, when semi drivers get regenerative braking on the downhill and the far superior torque on the way up, you'll pry EV-semis only from their cold dead hands.

I still don't see why PHEVs aren't a thing in Semis so you can get regen braking, torque, efficiency, and range, but what do I know.

Edison Motors is making it a thing.

I remember watching a video 3 years ago by Tom Scott about trucks with overhed power like trains have. https://youtu.be/_3P_S7pL7Yg