I read the article and did not see anything as to how much per mile it costs to fuel it compared to a diesel truck.
What I did read was emissions standards (global warming) is the push behind their efforts.
The whole thing sounds impressive. My skepticism centers around it’s overall operating costs compared to a conventional diesel truck.
Then we have extreme cold climates. With this design be better or worse? It’s an electric hydrogen hybrid. I see the hydrogen part working OK in subzero temps, but typically anything electric is much less efficient in extreme cold.
The fuel cells generate heat when under load. The battery systems of electric vehicles are vulnerable to cold, and usually draw upon their reserves to maintain an operational temperature. Assume in this case, the fuel cells maintain battery charge to full capacity under normal operating conditions.
Toyota (and surely Honda and Hyundai) did extensive cold and hot weather testing on their Hydrogen Electric. Here’s Toyota’s cold test: https://www.youtube.com/watch?v=3YOUgMFHp5g
Toyota fuel cell hot weather test (120 degrees in Death Valley) https://www.youtube.com/watch?v=1LTlF8ndygU