CC, log cabins are pretty common up in the north here too, but I think the main factor is that everything is further away the farther north you go, so being able to build a structure that has decent insulating properties with a material that can be sourced on site has probably aided in the success of the design. Plus, they look pretty good. But you can make thinner, more insulating buildings with modern materials too. Often that isn't necessary though, and log cabins have the added benefit of not requiring framing, as the structure is self supporting. So pretty easy build. Here they sell pre-fab log cabin kits, and it's basically like building a lego house. Getting the frame together for a 25 square meter cabin took us 2 days out at the cottage. Of course, you still need to make a roof and put in floors like on a normal house, but the walls came up super quickly.