AudioBookShelf[1] is for audiobooks and podcasts.
For music I use
navidrome [2]
The smart playlist feature[5] is awesome. Having 3 services instead of one seems overkill, but specialized apps instead of one generic one feels different. One interesting aspect of navidrome is, that it has implemented the Subsonic API, which MANY Apps make use of. My personal favorite is Substreamer [3]
but you could also go with DSub[4] or others.1: https://www.audiobookshelf.org/
3: https://substreamerapp.com/