I'm a Google Play Music user and mark my words, the day they kill the service is the day I go to spotify. I'm not going to whatever Prime-like monster they're creating.
I just can't understand the choice to kill Google Play Music. Not only is it fantastic, it integrates perfectly into Google Home. Subscribing to Google Play Music also got you Youtube Red. If they want to charge $2 more for Youtube Premium, fine, whatever, but don't kill Google Play Music.
Honestly, no point in waiting. I paid for google music for a couple of years before switching to spotify. Spotify is a lot better - more music, better recommendations. about the same price.