I use Apple Music. You probably don't and that's awesome. I'm glad you're happy with the not Apple Music service that you're using. Anyways, Apple Music generates a number of playlists and they update them on a weekly basis. I wanted to somehow archive these. Adding a playlist every week seemed to not scale well and so I finally settled on using SongShift to dump the contents of the weekly playlist into a single playlist that would just continue to grow, but also not have any duplicate entries.

Luckily since SongShift is a pretty cool app, once you pay to unlock most of the power features (which I have no problem with!) you can easily fire stuff to multiple services. So, here's almost the same playlist on Spotify.

The Spotify playlist has a few more tracks because I was using SongShift to share things to Spotify before I came up with the above scheme.