Can confirm this is no longer the new thing, but FWIW, jazz music similarly fell out of style ages ago, but that doesn't make new stuff in the genre uninteresting to those who enjoy it irrespective of hype value.

That is, it's no longer nifty and fashionable to listen to this type of "Brostep", but people who liked it without regard to its social status may continue listening to new material as though nothing changed, while others may have grown tired of the sound or the social clout it may have brought them to be "in the know" or part of some zeitgeist and simply kept up with "today's hits".

The same is true of lots of genres IMHO.