I was on Google Play Music from the beginning, and only left when they cancelled my early access plan without asking me and refused to reinstate it. Apple Music has leapfrogged them in every way, and Google Music has only regressed since launch, especially in terms of UX.
I did really like Google Play Music, and allowing the local library sync as a free draw was a really smart move. But the sour taste they left in my mouth by killing my discount plan and ruining the UX meant I looked at other options. Signed up for Apple Music day one and it has improved leaps and bounds since then.
It's very clearly a huge priority for Apple, and they aren't resting on it.
I keep hearing that there may be problems with Apple Music, such as replacing local files. Having quite a lot of content which is ripped from vinyl I'm hesitant to try it. Have you had any difficulties with it?
I've never had it replace local files. I would say you should back up your music collection like anything else in case something happens, but as long as the files are there locally I see no reason why it would replace them.
Maybe it wants to "move" everything to your local library and messes it up / puts it into some idiotic inaccessible format like Photos. Then you can "export" them as "raw" which takes hours and will crash / just stop a bit of the way in. I've had bad luck with the photos app with just ~10k photos. I still miss Aperture.
