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Metal fans like their metal, apparently: A new study by Spotify found that metal fans are more loyal to their genre of choice than fans of any other genre.

“This doesn’t necessarily mean Metal is ‘better’ than Jazz (metalheads would disagree),” Spotify said on their website, “but it does tell us that Metal fans are in fact the most hardcore, according to this new measure of genre loyalty.”

Spotify gathered this data by identifying the “core” artists central to each genre, then “divided the number of streams each core aritst had by their number of listeners.” See the details of the study here, including how the data differs from country to country.