The software has issues but still a user error
If you want a streaming service with no local content then the software will sack off your local music collection. If you're a spod like me that has 15 different versions of the same album and 50 different versions of the same piece then a basic streaming service isn't going to work. If you ever accidentally push the button to let 'iTunes organise your music' and witness the instant clusterfuck it makes of all your perfectly organised files it's instantly clear how such a streaming service isn't going to work. There's little concept of albums, different recordings or performances, they're just tracks, it's 'this song' by 'that artist' that's all it seems to understand, if you have straightforward music listening habits then it might work.
I may be one of those odd people that still buys music but I have 1000's of albums all ripped to the computer and use iTunes to play them, other than the software being really slow and clunky after version 10.x I can't say I've ever had something go missing or lose access to my music. If I'm working on a new song then I'll bounce it as an MP4 to iTunes and copy that to my iPhone to audition in the car, again this is more laborious with all the extra shite they've had to add for Apple Music, it would be nice to be able to switch all the extra features off and turn it back into the good ol' days of the iPod.
But if your music library is important or vital to you, don't run software that you know will delete files!