It's not just windows users, Apple, you have dropped the ball continuously since iTunes and iPods worked amazingly together once upon a time.
What I'm really missing now (on Windows, sold all my macs but still have the iphone), is an 'Audio Files' (call it Audio books if you like) app along with Music and Podcast apps. A Photos app for Windows would also be good.
I'm sure many, many users like myself have hundreds of audio files which have been collected over the years: lectures; sermons; language lessons; audio books; whatever they may be, and now they have no home. Even if I transfer them with the USELESS new Apple Devices app, then what? Try play them with Books, go on, try it. I have 'Albums' and 'Genres' of lectures which need to be played in order, like a book, they are not audio book files though. These were easy to arrange in iTunes with Author / Album and the like. In the Devices app, there's no Author / Album / Genre selection and the audiobooks are impossible to view / manage. Completely impossible if you have a library of mp3 audio files, which are not audio books, but which need to be arranged.
I'm sure this would be best solved by an Audio books or Audio files app that allowed me to grab multiple Albums and drag them onto the iphone and listen within that app, essentially a podcast app for private files.
This is SUCH a good idea, and SO useful, I have no doubt it will never be done. : )
Everything works as it should in iTunes where I designated these files as 'Audiobooks' and listen to them on the iphone with the Book Mower app. It would be good if Apple brought this all 'in house' though, and especially before iTunes disappears forever. Basically, at that point, I'll trash the iPhone if there isn't a solution.
Also shouldn't have to use Microsoft Photos app to pull photos off an iphone. Apple should make their own app for it. Basically, treat Windows users well and they'll be more likely to get a Mac next. As for the audio files problem, there's not even a Mac solution for that.