Reddit has, for good or bad, always attracted a "help all newbies" mentality too.
I'm not complaining most of the time, but sometimes I want to be able to spend a day working mindlessly on my computer to try new things and fool around.
One other factor not commonly mentioned is that many people ossify and have difficulty expending the mental energy to seek out new music. I personally don't do that anymore but I certainly did for a while when I was much more stressed out with work. Additionally, some genres themselves seem to get into a rut and tap out (let's not forget the "punk's not dead" attempts at denying reality, for instancee)
Nah, back then I just used LimeWire to download fake Weird Al Yankovic songs.
Though, I did discover the Avalanches because a guildmate I met while playing an MMO sent me the MP3 in MSN Messenger.
edit - it's not as fun as I remember it used to be
IIRC there was also something vaporwave-related (predictably).
(Dammit, this all was really long ago.)
/mu/ collaboratively produces albums all the time. I was present for and might have contributed to this one: https://millennialdreamcorp.bandcamp.com/album/drake-josh-jo...
Music recommendations feels like somebody constantly prodding you with "oh don't like this? try this!"
Perhaps it was the combative nature that made them so much fun.