Clearly designed by someone who hasn't used a pickup truck to it's real potential.

ceci n'est pas une truck

https://www.thedrive.com/news/the-most-single-cab-truck-ever-was-built-to-haul-construction-materials

Then you could add forklift forks and you have a sideloader!

It may be because a large enough load could quickly block the driver's left-side mirror.

Oooh, another thing is that a heavy enough load may imbalance the vehicle enough to make it unsafe on turns.

Anyone see anything else?

Yard trucks are just a minor evolution away

Probably bad aerodynamic. Don't they use something like that on the airport? Since they don't drive far, aerodynamics are probably not that important.

You joke but this is basically what a vintage British Bus looks like, except the non-cab side is for the Engine.

It would "work", but it would be aerodynamically unstable so would be limited to low speeds (<~25mph). This is why this configuration is quite common in construction/industry site machinery, where high speeds are unnecessary and unsafe.

I used to work at a furniture factory and we got all our steel delivered in a truck with this configuration. 8m and 10m lengths on the shortest possible wheelbase. No backseat though.

Because the steering wheel is on the wrong side.

Source: 'Merica!

https://www.thedrive.com/news/the-most-single-cab-truck-ever-was-built-to-haul-construction-materials

Cybertruck designer here: Just had a huge whipper (subscription based), some dishwasher style metal pannels, and we can sell these babies for 200k.

Looks very similar to our yard mules

Beautifully silly

Don't you hate it when you have a genius idea, only to find out someone else thought of it long ago? Nice try, Einstein. Back to the sandbox.