You’re right, didn’t phrase that well, Wideroe is flying PSO routes. Here is an interesting thesis
http://othes.univie.ac.at/42439/1/2016-05-12_0803607.pdf
That’s interesting. When they built the short field infrastructure the idea was to connect all of Norway. Small city to small city just as much, or more, than creating a hub kind of thing. The other reason was to go from sea based airports to much safer and much more efficient land based airports.
Today though, bridges and tunnels have made the roads much faster and more efficient. Many of the small airports are disbanded, replaced by fewer and larger airports, capable of taking medium sized jets. Lofoten will get one airport soon. Between Trondheim and Bodø, at least 3 smaller airport will vanish, replaced by one larger. There will still be lots of smaller airports left, and the future “plan” (or wild, unrealistic idea 
) is to use electric aircraft on these airports, and then use relatively small aircraft. Time will tell. IMO commercial traffic with small aircraft seems to become increasingly less economical and less practical each year due to security and safety “concern”. On the other hand, at some point the aging fleet of dash 8 (100-300 series) has to be replaced by something.
