[cptskippy]

The power-train is everything from wheels to engine. Where as drive-train is the power-train minus the engine.

The transmission is the most complicated part of the drive-train and arguably more complicated than all of the other drive-train components combined. In current EVs there is no transmission, just a single reduction gearbox.

In an EV the engine is dramatically simplified compared to an ICE and there are significantly fewer parts and almost no moving parts in comparison.

Another thing to consider is that all internal combustion engines have multiple supplementary systems that are required to function such as cooling, fuel delivery, and ignition. At most an EV motor might require supplementary cooling but no commercial vehicle has one that I'm aware of.

[throw0u1t]

Of course, ICE powertrains have lots of moving parts, but the comparison that EV cars are simple is just not an accurate representation of EV cars.

There are fewer moving parts, I agree. The architecture itself is simpler too, I agree. But the individual components are still massively complex and expensive. High density Lithion-ion is very complex, and also requires a number of supplementary systems to manage power, heat, cooling and monitor the array.

[cptskippy]

You could make the same argument about the exotic metallurgy used in ICE components. Just like with an ICE subsystem, most of those subsystems you mentioned aren't trade secrets and have far greater operating tolerances than in an ICE.