What makes core functionality? You stating it is needed/ wanted doesn't make it so. The fact is that this was designed from the ground up and possibly the previous functionality is not available due to the new back end coding to handle the 64 bit. I deal with this daily in my support as the $10k (and that is the base package price) software I support was recoded on the back end and functionality that was possible in prior releases is not possible due to the nature of the new coding structures. Some functionality is lost and causes issues for my clients, but the core functionality remains. I would say the core functionality is there in 7 as well. You can play music, search music, etc. Just because features you were used to are no longer there, doesn't make it feature incomplete or broken at the core. In fact the feature might have been removed as the coding caused a bug that is yet to be fixed and the functionality desired may return once a fix is discovered (or it may never de added). I would say there is no definition of a feature complete application as the music app as it was was missing iTunes Radio so it couldn't have been feature complete.
I consider it the core functionality of my iPod to store and efficiently navigate 64GB of music. If it can't do this, it is not feature complete. If someone has a better definition of the core functionality of a mp3 player I'm all ears.
The storage part still works but the navigation is broken. The amount of scrolling required by the iOS7 music app is insane.
Stuff like iTunes radio are nice gimmicks, but they don't substitute the hindered access to the music on my device.
As long as Apple can't provide an iOS7 music app that allow efficient navigation of a 64GB music collection, they should make it easy for people to revert to iOS6.
The old music app was structurally sound, it managed to
logarithmize the amount of scrolling required in proportion to the size of the music collection (not 100% mathematically correct, but it felt that way).
Scrolling through the new app is closer to
linear in relation to the number of tracks.
For the programmers: the old app allowed you to select an artist, then an album and then the songs of the album were displayed. The number of songs you have to scroll through at the end in pseudo-math is [number of songs] / [number of artists] / [number of albums].
The new app insists of showing all albums at the same time. The pseudo-math expression for the size of the list to scroll through turns to [number of songs] / [number of artists]. The resulting number is just way too high.
I consider this a serious problem with the core functionality of a mp3 player.
Although it is unfortunate they have done this, it is the price of progress. You are free to stop using your device, sell it and buy one more suited, learn to work around your issues, just deal with it as is and hope for the future. You have alternatives, not always the best or what you want/ would like but that is the beauty of a competitive market.
Progress would be if the new app was still user friendly, maybe looked different but had improvements. The new however has no real improvements (sans for iTunes radio, which isn't a real competitor for Spotify and Google All Access anyway), only crippled core functionality. The update is dominated by worse user experience.
I say learn from this and in the future do better research prior to jumping in as an early adopter (you could have went to an Apple store or dealer and tested an "upgraded" device to see of it met your needs. You have just as much responsibility in this as Apple does
Why did Apple jump the gun with blocking iOS6 installations when the new OS isn't ready for prime time? This is very arrogant on their part.
I have zero responsibility. Software can be installed, tried out and uninstalled if it doesn't suit you. If it can't, it's malicious software and the developers are to blame.
If anything, users should be encouraged to try new software for the sake of progress. The way you phrase it, users should not try new software out of curiosity but only after they studied it extensively via reviews and videos. Where's the fun in that? Doesn't Apple market itself as the "fun" tech company where you are invited to just try stuff and have fun? Well, trying iOS7 (in it's current early state) is no fun at all for me.