I am a prolific Garageband user, therefore I have lots of my own songs in my iTunes collection, which obviously will not be available via Apple's music library…
I am currently paying for iTunes Match and Apple Music. If I were to quit using Match, would I still get my own songs via upload to the cloud or whatever, or would I only be able to access Apple's music? I'd die if I couldn't stream my garageband projects to all my devices.
Best Answer
Apple has a quit informative support-article that addresses the differences between Apple Music and iTunes Match. Both include the iCloud Music Library witch can store your songs, the main difference between both services is what will be stored within this library:
iTunes Match
Apple Music:
Apple Music and iTunesMatch:
So to answer your question directly, your own projects would continue to be available on all devices if you would just use Apple Music.