And yes, there's also: Backup Manager for iOS devices, and, somewhat unique to me as an iOS developer, iTunes also holds the keys for me to be able to build to my devices which is all kinds of fun let me tell you.
I hope at some point they revisit iTunes and re-do it completely but that seems like something Steve Jobs would have to push through. As much as I get annoyed with the deification of that man (frankly he as just a really good salesman, nothing more) I think a majority of long time Apple users would agree that their software has taken a hit in quality since his passing, the debacles with iOS 9 and 10 updates bricking various portions of the iPhone comes to mind.
Step by step, Apple are pushing their customers towards subscription services. They did it with photos first, then music. From macOS Sierra onwards they'll be doing it with the "Documents" and "Desktop" directory.
iTunes has always acted as an advance party for Apple's next business experiments. It gets UI changes ahead of the OS. It gets "features" like this subscription funnelling ahead of the OS.
- music player
- content manager (music & video)
- sync manager
- update manager
- Apple Music client
and these are the five things I can name on top of my head, without opening up the app. This is fine, but they are not honoring their boundaries. When I am listening to my music, don't mess me with the sync business. If there is a new version, put a helpful icon but only steal my focus if I click to sync tab.
It's like going to a supermarket to buy a piece of candy. Sure there are meats and potatoes on the next shelves but I need my candy. Yes I can hear you overhyped sales person about the discounts but. I. Need. My. Candy.
Also I cannot see the logic behind the Apple Music's integration with iTunes. I have tried to use AM with iTunes on windows and it is not a fun experience I can tell you. Spotify, even though people are grumbling about its ux, provides a smoother experience. Search, double click play, right click to save or add to a customized playlist. Or mess with that knob to download.