The same will hold true with iOS 7: Yep, Apple’s recent older devices will get the upgrade — but when you read the fine print at the bottom of the company’s website, you’ll see that neither the iPhone 4 nor 4S will get marquee features like AirDrop and in-camera filters. Got an iPad 2? You won’t get access to any filters at all. And those devices will continue to lack the aforementioned basic features from last year’s release.
The bottom line is that both platforms have issues with “fragmentation”. It totally depends on how you define it.