Why is "Traditional Nordic dance music" trending?

Wikipedia Overview

Traditional Nordic dance music is a type of traditional music or folk music that once was common in the mainland part of the Nordic countries — Scandinavia plus Finland. The person who plays this kind of music might be called speleman (Swedish/Norwegian), spelman (Swedish), spel(l)emann (Norwegian), pelimanni (Finnish) or spillemand (Danish). Finnish traditional dance music is often called pelimanni music in English, while there does not seem to exist a similar, widespread term for the corresponding music from the other countries. It is often more meaningful to distinguish between the traditional dance music from different regions than between music from the countries as such. Some concepts in the field can be defined as Norwegian or Finnish, but most are either common to all four countries or local. Besides the dance music tradition, all countries also have other traditions of folk music that are not shared to a similar extent.