Why not diesel electric trucks?

BenK wrote:
Electric motors, especially DC motors, can have over 300% torque at ZERO RPM

No ICE's can do that and getting it going from a dead stop requires that. As all ICE's have no torque at zero RPM

That's why they use a transmission with a clutch or torque converter.

My Hybrid car uses a system much like a diesel-electric locomotive, at low speeds, the ICE engine powers a generator that (along with the battery) powers the electric motor to drive the wheels. At higher speeds, the ICE engine can be coupled to drive the wheels mechanically.

All ICE's use an electric motor to start it because an ICE can NOT develop torque until it gets RPM

While most ICE engines needs some sort of starter motor (not always electric, sometimes air, sometimes a crank, etc), some air start systems inject compressed air into the cylinders to turn the engine for starting so no starter motor required.

But more interestingly, some ICE engines can start with combustion alone, Mazda's Skyactive start/system system knows which cylinder to fire to start the motor by injecting gasoline and firing the spark plug:

https://www.mazda.com/en/innovation/technology/env/i-stop/

But even those have a starter motor for cold starts, and to handle the case where the cylinders didn't stop in the right position for restart.