That's a really, really high theft rate. Interesting to see that the Dutch are showing an interest in this style of bike though, as it's quite different from the usual upright/granny bikes.
I do wonder how easy is it to get fatbike parts there? I own a Dutch bike outside of the NL and it's very difficult to get replacement inner tubes and rollerbrake grease as an example. Last time I did maintenance on the IGH I ended up using mineral ATF bath and a red lithium based grease to repack, couldn't find anywhere that had the Shimano stuff in stock at a sensible price
The Netherlands recently passed a law requiring helmets on mopeds. This makes mopeds less interesting leading to fat bikes being more attractive, because a helmet is not required on a fat bike.
The majority of fatbike riders I’ve seen are lazy teens. These are not the people that want to ride bikes. Usually these kind of people would’ve bought a scooter or moped the moment they turn 16.