A long time ago I started to use the iPhone music app. Then I quickly discovered that songs sent to the iPhone could not be sent back the other way. This was just the beginning of Apple's lock-in. I got out of it right then and there. Now I store my music on my own server and use one of the many third party music apps to play them.
If a service smells of lock-in, you can be sure things won't become better, they will become worse like the issues people get with Apple Music and iCloud. You care about your files? Then you manage them, don't trust some service you have no control over.
If a service smells of lock-in, you can be sure things won't become better, they will become worse like the issues people get with Apple Music and iCloud. You care about your files? Then you manage them, don't trust some service you have no control over.