If the music blog ecosystem hadn’t been decimated by DMCA takedowns, streaming services, and the broad centralization of the internet, ”Forever,” by the Danish producer Hekt featuring Smerz , might be ruling the Hype Machine ’s charts right now. The mp3 blog aggregator was, theoretically, taste-agnostic, but there was a general vibe to the music that got big there in the site’s heyday: The songs that flourished, like “ Paris (Aeroplane Remix) ” and “ Crave You (Adventure Club Dubstep Remix) ,” were both pretty and edgy, and often tapped into the primal pleasures of hearing a radiant pop melody atop bassy, Limoncello-scented club music. That sound flourished in the early 2010s, when, as documented in the uncannily perceptive Zac Efron film We Are Your Friends , the brittle hedonism of EDM offered a respite for millennials in the face of swelling debt and unrelenting joblessness.…