Google has provided the following notice (full text found here):https://support.google.com/googleplaymusic/answer/9973710?hl=en&ref_topic=6230811
"Info about the Google Play Music sunset
Earlier this year, we announced our plan to sunset the Google Play Music experience. We know that you have questions about how and when this will happen - please visit this page for the latest updates.
Here is an overview of what you can expect:
|August 2020||Access to the Music Store on Google Play, and Uploads to Google Play Music through Music Manager will start to go away.|
|September 2020||Access to Google Play Music begins going away for some users.|
|December 2020||Access to Google Play Music for all users is gone.|
Transition to YouTube Music
Google Play Music users can now transition their account over to YouTube Music with just one click. Learn more here.
Any data (e.g., your uploaded music, your library and playlists, etc.) that is not transferred could be permanently lost. We will not be able to retrieve this information so we encourage you to transfer your account to YouTube Music or download your existing library and data using Google Takeout.
You can also delete your Google Play Music recommendations, history, and music library at any point by following the steps here.
If you subscribe to Google Play Music through Google billing, and you decide not to transfer to YouTube Music, we’ll automatically cancel your membership. You’ll keep your membership benefits until the month that Google Play Music shuts down in your territory. Your specific Google Play Music access end date will fall on the last day of your billing cycle."