Sure. I have a little home server running Linux and 2 or 3 machines that access files shared by this server. I use Plasma on my desktop machines and I rely a lot on tags (just to clarify, Plasma uses xattrs - more specifically user.xdg.tags) to tag files. On the server I already have a couple of scripts that automatically insert some predefined tags on files.
Thing is when I try to copy and/or move files between server and desktop, depending on the protocol I used to mount the shared, I loose this information.
People suggested rsync, and it would be an excellent option if what I wanted was to keep both sides synchronized or something like that. In fact what I need is just a solution that allow me to mount a server share content and allow me to transfer files from it preserving their extended attributes, preferentially using a file manager (I use basically Dolphin or ranger).
No need to keep then synced.
Supersonic is a pretty nice player indeed.
It's really sad it's not that well integrated in KDE Plasma. I believe it's based on Adwaita, or whatever it's called and it's not as aesthetically pretty as native KDE apps. Also (and I think that is really annoying) it's impossible to maximize / close to the system tray with a single mouse click the way other applications work (Cantata or Elisa, just to name a couple of better integrated Plasma music players).
I've tried several Linux Subsonic compatible music players and Feishin and Supersonic are the best ones.
Btw, besides Navidrome and Jellyfin it also supports lms, that is the streaming server I like most.