If the plane really is task built that would be super cool. Huge plane (108m/356ft), carrying pretty light cargo all in all (blades of this length weigh probably 20~25T), that ideally can land and takeoff on short runways (to maximize the number of airports it can deliver to). By compare, a 777 will be either 60 or 75m long and carry 220t, and itself weigh 160t. Neat idea. Being able to get bigger blades to sites would be great. It also would enable centralizing the production better, which could be an efficiency win; a couple big factories cranking out blades. There's a lot of practical scale-out this would enable.

The plane really is pretty wildly proportioned. I'm not sure what the total internal volume/cross section is expected to be but that's a long plane! Carrying not much weight! The blades are big but not colossal: by compare, the offshore Vestas V164 10MW turbine has 160m blades (weighting 35t); this is being designed for ~100m.

It's definitely good to ask what else such a craft might be useful for. The low capacity is an obvious downside, but if it can access lots of airfields that could be quite enticing.

Edit: Missed this: With a capacity for 80 tons. That's a lot more than I expected! It doesn't seem to make sense to me, for the payload it'll carry.

Also: The WindRunner includes shoulder-height tires and has the ability to land on a packed-dirt 6,000-foot runway, which would need to be built for each project. Well, that's neat & potentially immensely useful for a lot.