Is Apple ready to deprecate Music.app?

There used to be a time when you could use iTunes to upload your own music collection, and have it ready to play on all your Apple devices, whether the music was purchased through the iTunes Store or not.  Back then, you could also use iTunes to rip a music CD and save the music files in AAC or MP3 format. Nowaday's it's still possible to import your own music in the Music.app on your Mac, but somehow these songs are no-longer synced between devices. So you have to do this on every Mac separately, and also your other iDevices (iWatch, iPhone and iPad) don't see anything of this music at all. 

I weep for it becoming increasingly hard to buy and own your own music. 

All subscriptions for streaming music services are around $10-$20. If you want to listen to new music often, then this is a great deal. If, however, you are like me and want to listen to the same 1000 or so songs often, then this is a horrible deal. Better to buy these songs outright and just pay for them once. 

I bought my first iPhone (model 4) in 2010, and from that moment onwards I started buying music in the iTunes Store that came installed on the phone. That means that I've now had 14 years to buy music at Apple's. I have 4.33 GB of songs downloaded on my iPhone right now, so that is about 866 songs (assuming 5 MB per song), or 5,15 songs bought per month over a 14 year period. If we assume every song was priced at $1,29 (the most expensive price option), then I would have payed $6,64 per month over this 14 year period. That's quite cheaper than the $10,99 per month that Apple is now charging for their unlimited music streaming service. And this is precisely the reason why Apple is doing all it can to undermine the buying and playing of songs on their iDevices.

I don't know of any official statements to the effect that they want to stop the buying and owning of music, but the UX in the Music.app makes this very clear:

• As mentioned above, the Music.app no longer syncs your own imported songs.
• Since a few iOS versions back now, the playlists that you make on one iDevice no longer sync with the other iDevices. More specifically I see all my playlists on my Mac, most of my playlists on my iPhone, none of my playlists on my iPad and most of my playlists on my iWatch (I assume the iWatch sees what the iPhone sees?). 
• To make matters worse, 1/4 off all the UX real estate in the iPhone Music.app is now dedicated to advertisements to push you to the subscription model.
• And, just today, I found out that a song I once "bought" is no longer playing on my devices. The song in question is "Diamond Heart - Single" by Alan Walker and Sophia Somajo. I don't know if is simply a strange bug or that these artists have received their royalty payments from Apple years ago and now have found a way to deprecate music that I payed for from my devices?  

I remember finding on Hacker News some years ago an article by the BBC about the deprecated Microsoft book service. It was called "The e-books stopped working".  I remember bemoaning the fact that a book can "stop working" back then. I always assumed that the Roman Empire fell because of the increase in complexity making it harder and harder to do the simple and sensible thing to do. Is this how all empires fall?

I don't know, but for now I am gloomy on the prospect of us ever having a simple and affordable way to buy, play and own our own music. Maybe this is the reason why I usually buy my books in the dead-tree version and only my pulp holiday reading in ebook format.