There are three qualifications for reviewing iTunes: one should have used it since v.1.0; one should regard it as as a kludgy blob of bloatware that does a few things well; one should be open to change, and accept a few new paradigms and perhaps a loss of some old features if it means the new product is slim, smart, and unintuitive. For example: iTunes handles movies and TV shows, neither of which are tunes, but that's how you sync to your mobile device or play them through the TV. It handles phone management, so it knows about all your apps, and handles updates and backups. Well, it handles updates through the App Store pane, which is a different place in iTunes than the pane where you see you sync and backup info, but nevermind. It lets you sync your books, even though those aren't tunes either. And the books are added by a separate app.
Otherwise it's a totally seamless experience.
If some of these things were spun off into different apps, or iTunes was visually organized to draw sharp distinctions between each medium, it wouldn't be the end of the world. The new version of iTunes does not do either. It adds Apple Music, the new subscription-based streaming system. This is different than Radio, and it is different from iTunes Match - both of which are still around. How does it work? Well, I've seen wads of cold spaghetti that were less complex.
An early review of Apple Music is not impressed, but looks for something nice to say:
Can you delete the radio stations? Hard to say. People ask about that on the Apple discussions site, but the answers apply to old versions. You may ask: why do you care? Just don't click. But it's not like a radio station, really. There are stations I don't know exist, because I never play them. I do not want them to be demolished. But a window on a screen is different; if it presents options you do not want and cannot be customized, it's their window, not yours. I mean, the first thing you see at the top of the radio banner is the Beats logo, spreading the width of the page. I'm pretty sure there's nothing on that channel I care to hear. But there it is. That goes for the Children's Lullaby channel, too. That goes for the Pop section sponsored by Pepsi, which starts a Pepsi video if you click on it, because you've never heard of Pepsi before.
Anyway, that's the radio feature. Apple Music is different. Apple Radio plays songs they've chosen for you, like radio. Apple Music plays your music, except you don't own it, and the options are a collaboration between your input and their guesswork.
When you launch Apple Music you get a nifty interface that asks your music preferences, and lets you nuke some so they're never heard. They're rather broad; I'd prefer more specific genres, like "Young men yelling over samples of music they did not write," but you're stuck with the basics. Then you're asked to choose between certain artists - tap once for like, tap twice for love, click the X box to eliminate. Okay, that helps; that narrows it down. You're still stuck having to make a blanket judgment about, say, Elvis. There's a few songs I like. Maybe one I love. Do I want my stream to be choked with Elvis? No. Do I want a stream in which Elvis never makes an appearance? I don't know kinda maybe no not really. But you can hit RESET and ADD MORE ARTISTS to fine tune what you want. Then it thinks a bit and comes up with your channels, available in the FOR YOU tab of iTunes. Your experience may vary, but I got four panes, three devoted to a particular artist, the bottom pane consisting of five suggested albums, from Daft Punk to the Wiener Phiharmoniker.
This is different than NEW tab, which has everything in the world that is new.