Yes, it has less utility than many other vehicles in many ways, but the bed length (5 ft) is longer than a lot of trucks I see on the road which enables carrying certain kinds of loads that aren't easy in cars or trucks with very short beds as seems fashionable now.

150 miles isn't a ton of range, but it's 50% more than a first generation Leaf and those sold.

The Slate clearly isn't trying to check all the boxes, but every vehicle doesn't need to try to do everything.