While Spotify covers most popular stuff there's a huge amount of music that isn't available on any streaming service. Plus, your content might disappear any day.
I use Spotify for previewing, exploring and making some buying decisions but my actual collection is mine. It's lossless, DRM-free and I plan to have it for ages to come.
This is it for me, I used Apple Music for a few years and eventually I noticed that some of my playlists would have tracks missing - sometimes a listing would be ghosted, sometimes it would straight up vanish. I called time, brought a A50 and haven't looked back: https://chanc.ee/posts/20200830-abandon-stream.html
Granted my music tastes are esoteric but silently modifying my playlists felt grievous. Now I make sure that subscription money goes on supporting artists directly.
But the nice thing about apple music is that you can add any song to it on your PC and it syncs it to all your devices. So if you have an esoteric taste, you can mix it in with the streaming service.
I use Spotify for previewing, exploring and making some buying decisions but my actual collection is mine. It's lossless, DRM-free and I plan to have it for ages to come.