@stompykins
OK, I'm answering to your comment after trying Quod Libet.
Quod Libet doesn't fit into my needs. These are the reasons.

It uses GTK and looks ugly in KDE. It doesn't support AlbumArtist tag and uses Artist tag in all places. I don't use Artist tag to maintain my collection (I use it only as information about featured artists, for example when guest rappers are on somebody's album). It doesn't recognize directory symlinks in chosen directory of music collection. I have separate directory for ripped CDs. Subdirectories of this directory are symlinked in my ~/Music/ directory. Quod Libet doesn't see these symlinks. It doesn't use breadcrumbs navigation and whole-window views (tiles or list) of nested resources defined by tags (like in navigational file manager), which was my expectation and was described in my first post.

To include new lyrics providers, it's added here:
https://github.com/strawberrymusicplayer/strawberry/blob/master/src/core/application.cpp#L68
and:
https://github.com/strawberrymusicplayer/strawberry/blob/master/src/core/application.cpp#L155

Then here: https://github.com/strawberrymusicplayer/strawberry/blob/master/src/CMakeLists.txt#L162
and here: https://github.com/strawberrymusicplayer/strawberry/blob/master/src/CMakeLists.txt#L378

try https://www.theaudiodb.com/

+1 for this

please please support this

That looks great, especially since you can use Maloja as a proxy to forward scrobblings to other services too. I vote for supporting it!

Yes, I like to see feature too

@EagleShinobu Can't you import music files via the linux file manager?

I wrote an update for the linked web-ui for Clementine. It now uses mpris2, Python 3, and pydbus. It's here: https://github.com/juliusvering/clementine-webremote
I'll go ahead and adapt it to Strawberry next.