There just isn’t just one type of “cool” anymore. Media is extremely targeted and everyone interacts within their own bubbles to the point where they don’t know about the other bubbles. There are artists with 1B+ streams that I haven’t heard of, because none of the algorithms ever recommended it to me.

Same applies to “cool”ness, as there aren’t a handful of tastemakers that decide on “what’s more or less cool for a given environment”.