Ask HN: Google Music alternatives for people that buy music?

The GOOG is forcing a transition from Google Music to YouTube Music at year end. The former has always freely allowed me to background stream the songs that I have bought over the years. After the transition...

> Background play is only available to paid users of YouTube Music. However, the free version of the music app allows background play for your uploaded songs and streaming on smart devices with Google Assistant. Don't forget that you can still enjoy background play and radio in the Google Play Music app until later this year.

(I cannot find this detail in any article about the change. Only in an announcement emailed to me.)

Can anyone recommend a hosted-but-offline-capable, you-own-your-music, desktop-and-Android service that will let me avoid both YouTube and the Google Assistant ecosystem? I am happy to pay a couple of bucks for some party to securely host my music with a decent app.