bandcamp is pretty great. Granted, they are still a for-profit company; a popular community based solution would be nice. But they do let you download lossless file to self-host or just listen on device.
The only complain is the lack of classical music (not modern/contemporary classical) on there. But I would imagine most classical music is public domain by now. I just don’t know where to find them…
Edit: found it: www.classiccat.net or internet archive has a huge collection of classical music.