Having a separate instance with some communities for sharing flacs might be cool, but I don't know that I'd want it on the "flagship" instance since things like that typically tend to fully take over a community's culture. I want Lemmy to be a diverse sharing and discussion site for a variety of topics and not soulseek-but-it-looks-like-reddit.
I think certainly building a culture where we prefer "blessed" sources of an artist's music (directly on their websites, bandcamp, soundcloud, artist's youtube channel, maybe some day funkwhale will really take off for this kinda stuff) or just user-and/or-artist-respecting platforms and preferring those makes sense.
Agreed. I still run a mattermost instance for a few people, but if I wanted like a "community" there I'd absolutely need some of the Enterprise features.