It’s going to replace gas ICE vehicles, not EVs. EVs have their place in cities and short transport but they’re not efficient enough to work for large machinery or long hauls.

If your argument against EV for long haul and large machinery is “inefficiency” then I’m not sure how you’re arriving that Hydrogen is efficient. Gaseous hydrogen is very low density, way WAY lower than petroleum. I’ll agree that battery technology today isn’t the best fit for long haul either. However battery technology keeps getting better. Today’s prices are for battery are getting cheaper, lifetime of battery is increasing, and charging times are decreasing.

Hydrogen storage/density has essentially been stagnant for decades. Where is the massive increase needed to support Hydrogen in long haul? Where is the nationwide refueling infrastructure needed for long haul? Hydrogen refueling stations are fewer today in the USA then even just a year ago.