Speaking of the iTunes releases predating iTunes 12 I don't think the functional value of its store is the same if you want to buy and download iOS applications. It's no longer possible even with those iTunes 12 versions that are older than 12.7. As for the rest, the blow hit iTunes 11 the most since you can't preview songs or manage your Wish List section which became increasingly glitchy provided it wasn't a UI bug. The only experience that's worth it is the restored ability of Genius to connect to the iTunes Store.
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