Yes!

I purchase music from Bandcamp, where everything can be downloaded DRM-free. https://bandcamp.com/

I have a VPS with Navidrome as a web streamer/front-end. Navidrome also provides an API compatible with Subsonic. https://github.com/navidrome/navidrome

For iOS, play:Sub has a pretty nice UI, streams everything from the server, transcoded on-the-fly from FLAC to Opus. https://apps.apple.com/us/app/play-sub-music-streamer/id9553...

It's quite a joy to use and it feels good that the artists (especially lesser known) get paid more than through spotify/apple. I also throw a little bit of money at the Navidrome dev every month.