subsonic support

One thing not mentioned here is Strawberry's subsonic support. If you're hosting your music locally on a NAS or something, and using Navidrome or LMS to stream it over the network, Strawberry supports that. You get the best of both worlds; no need to keep a music collection on every device, and while you're traveling (assuming the Navidrome server has a public IP or you're using Yggdrasil or Headscale to access your home network) you can still stream stuff to Strawberry from your music collection. It's also great to have a playlist that includes radio stations right next to your locally streamed music.

The only thing missing (aside from a non-dated UI 😏) is better caching of music. Various subsonic-supporting android apps allow you to either manually download or automatically keep frequently listened-to tracks in a local directory. So when you're on wifi, you can stream, but if you're on a limited data plan or in a place where wifi/cell isn't available, you can listen to a few of your favorite cached albums.