Absolutely nothing in that article is related to underground at all. From the styles of music through to the VC-funded platforms.

Underground is record labels owned by a couple of friends pressing 250 records globally and distributing them by any means possible.

Underground is people putting all their spare money into putting on parties/gigs in obscure venues for the 100 other people in their city that like their particular niche of music/art.

Underground is not sitting in your room recording lip-sync videos and then sending them out over a platform used by millions.