Discoverability and usability in general is godawful on bandcamp. Always has been, and shows no signs of improving. Never heard of Qobuz. What made the mp3 blog era so unique was exactly the network effect referenced above. The curators had audiences, they were aggregated from larger platforms and both deeply specific and hyper erudite. There was a whole culture around this online, and waves of excitement around certain artists, which would spill into 'in the know' circles offline.
Googling who's playing at local festivals or using some random app isn't and can't remotely be the same thing. I could see a music based social network taking off in the future. Currently there's nothing with the buy in, and the existing platforms are way too financially invested in pushing major labels, AI etc to become real recommendation and sharing engines.