If another platform had the cross-device operability and catalog, I'd switch immediately.
Unfortunately their competition is not so great. Apple music has the worst UX I have ever experienced. I tried google music when it first came out but I liked spotify's catalog and ability to share playlists better at the time. And finally, there is Tidal which I haven't tried but I have heard it's not that good.
4 big competing streaming services and they all have glaring issues/missing features and yet seem to not be doing anything about it...
Without a qualified representative making a statement, it simply looks like a case of either poor engineering or pith-poor engineering, difficult to be sure which.
Definitely the type of defect that needs to be corrected in soft-wares before they can actually become worth money.
25 minutes later, and Activity Monitor reports it's written 1.05 GB to disk.