There’s also potentially cheaper maintenance - no engine to keep running, and less brake usage.

That could add up. Companies will be looking at these even if they just buy one to use as a yard shunter at first.

If the economics are there it’ll take off like wildfire.

A little cheaper, but in the parts that are different between an EV and a ICE are very reliable. You miss oil changes, but most routine maintenance is still needed (though few people rotate their tires as often as they should)

Mostly brake maintenance! But that's rounding error. Most of the savings is fuel.