This may be unpopular, but after using Kodi and similar software for many years (and enjoying it!), I just gravitated back to the basics. Want to watch a movie? Navigate to it in my file manager and play it with VLC. Music? Just use Winamp 2 or Audacious. I realized I was messing with odd HDMI passthrough issues, database issues, audio sync, broken plugins, stressing about tagging, etc etc every movie night much more…
The issue with Kodi is, in my opinion, the same as with setting up a mame cab for playing roms : Perpetual Work In Progress. Users are spending way more time configuring, optimizing, and eventually breaking the whole thing than actually enjoying it. On my side, i'm playing my content with my AppleTV through a Plex server on a Nas, using wired network, and I couldn't be happier. Using a professionnal, closed, solution…
Another path is to go in search of a better way to enjoy the music.
Both have their value, but if you start down the path of looking for the better way, don't lose track of the original goal. Too many audiophiles are still listening to their equipment instead of the music.
(Same goes for people playing vintage video games, watching movies, writing things by hand with fountain pens, supporting sports teams... this is a core part of modern civilization, I think.)